Download Level 1 Binder Sheet

Learning Goals
7th Grade Extended
More Percents
By the end of the unit, students will be able to…
1. To find simple interest.
2. To find compound interest.
3. To find percent increase and percent decrease.
4. To find the new amount after a percent increase or decrease.
5. To find sales tax.
6. To find mark ups and mark downs.
7. To find commission.
8. To use percents to model and solve real-life problems.
Algebra Binder Sheet
Name____________________________
More Percents
Section _________
Day
Homework
Due Completed?
Date
1. Simple and Compound Interest
Homework: Simple and Compound Interest Worksheets
2. Percent Increase and Decrease
Homework: Percent Increase and Decrease Worksheet
3. Percent Error
Homework: Percent Error Worksheet
4. Real World Applications (Mark Up, Mark Down, Commission…)
Homework: Real World Percents Worksheet
5. Quiz
o
The binder sheet is subject to change.
Name_____________________________________________________
Simple Interest Worksheet
Find the simple interest to the nearest cent.
1. $300 at 7.5% for 5 years
2. $770 at 16% for 6 months
3. $668 at 9.25% for 15 months
4. $285 at 8.5% for 2 ½ years
5. $360 at 185% for 2 years
6. $175 at 5.45% for 30 months
7. Sarah invested $150 at 8% simple interest. What is the total amount of
money in her account after 3 years?
8. Ben borrowed $800 at 9% simple interest for 2 years. What is the final
amount that he must repay?
9. Candace sold stationary to her family and friends. She deposited the
$125 she earned into a savings account. The account earns 5.18% interest
annually. If she does not deposit or withdraw any money from it for 18
months, how much will she have in her account?
Name_____________________________________________________
Compound Interest Worksheet
Find the amount of compound interest.
1. $7000 at 2% for 4 years
2. $7000 at 4% for 2 years
3. $1995 at 6.5% for 10 years
4. $12,000 at 4.8% after 7 years
5. $2500 at 5% for 6 months
6. $10,000 at 3.5% for 8 months
7. Mark deposited $2000 into an account that pays an interest rate of 3.5%
compounded annually. If he did not add or subtract any money from his
account for 4 years, how much will he have in his account at the end of the 4
years?
8. You took out a loan for $1500. If the account charges an interest rate
of 4%, how much will you owe at the end of 5 years?
Name_____________________________________________________
Percent Increase or Decrease Worksheet
Find each percent of increase or decrease. If necessary, round answers to
the nearest tenth.
1. 36 is decreased to 20
2. 175 is increased to 200
3. 6 is increased to 18
4. 642 is decreased to 499
Find the amount of increase or decrease. If necessary, round answers to
the nearest tenth.
5. 93 is decreased by 15%
6. 870 is increased by 62%
7. 62 is increased by 40%
8. 529 is decreased by 38%
Find the new amount after each increase or decrease. If necessary, round
answers to the nearest tenth.
9. 21 is decreased by 40%
10. 65 is increased by 182%
11. 103 is increased by 28%
12. 417 is decreased by 8%
Find the amount of sales tax and the total price for each of the following.
If necessary, round answers to the nearest cent.
13. 7% sales tax on $17
14. 4.25% sales tax on $21.95
15. 6% sales tax on $18
16. 8.25% sales tax on $125
Name ____________________________________________________
Percent Error Worksheet
%
100
=
𝑐ℎ𝑎𝑛𝑔𝑒
𝑜𝑟𝑖𝑔𝑖𝑛𝑎𝑙
Find the percent error for each problem. Be careful in determining the
actual (true) value vs. the experimental (observed) value. Be sure to show all
work. Round answers to the nearest tenth.
1. Samantha S. Sloppiness measured the volume of her soda before she
drank it for her midmorning snack. She measured the volume of the 12
ounce bottle to be 14 ounces.
2. Clyde Clumsy was directed to weigh a 500 g mass on the balance. After
diligently goofing off for ten minutes, he quickly weighed the object and
reported that is weighed 458 g.
3. Pretty Patty had casually recorded her grades for the nine weeks in her
notebook. She concluded she had 250 points out of 300 for the grading
period. However, Miraculous (chemistry teacher) determined she had 225
points out of 300 and awarded her a “C” for the grading period.
4. Drew D. came to Miraculous with a problem. Drew was told to measure 50
cm of copper wire to use in an experiment. Since his ruler only measured to
45 cm he used that amount of wire and his experiment was a failure.
5. Henry Heavyfoot was just stopped for speeding by Officer O’Rourke for
traveling 65 mph in a 55 mph zone. Henry claimed his speedometer said 55
mph not 65 mph.
6. Willomina Witty was assigned to determine the density of a sample of
nickel metal. When she finished, she reported the density of nickel as 5.59
g/ml. However, Mircaulous knew the density of nickel was 6.44 g/ml.
7. An experiment to determine the volume of a “mole” of a gas was assigned
to Barry Bungleditup. He didn’t read the experiment carefully and concluded
the volume was 18.7 liters. Miraculous knew he should have obtained 22.4
liters.
8. Jovial Joshua uses his thermometer and finds the boiling point of ethyl
alcohol to be 75° C. He looks in a reference book and finds that the actual
boiling point of ethyl alcohol is 80° C.
9. The melting point of a substance is 148.2° C. Grumpy George found the
value to be 145.5° C.
10. Amazing Ariel weighed an object on her balance and recorded a mass of
24.3 grams. Miraculous told her the actual mass of the object was 18.7
grams.
Name ____________________________________________________
Percent Application Problems
Find the missing information. Add or subtract the amount to find the final
cost.
1. Basketball
Price $17.99
Mark Up: 12%
Mark Up: __________ Final Cost: __________
2. Sweater:
Price: $39.99
Mark Up: 5%
Mark Up: __________ Final Cost: __________
3. Cordless phone:
Price: $64.99
Sales Tax: 6%
Sales Tax: __________
Final Cost: __________
4. Computer printer
Price: $149.99
Sales Tax: 3.5%
Sales Tax: __________
Final Cost: __________
5. Pair of blue jeans
Original cost: $27.99
Discount amount: __________
Discount: 35%
Final Cost: __________
6. Calculator
Original cost: $99.98
Discount amount: __________
Discount: 15%
Final Cost: __________
7. Shane works at a computer store. If a printer costs $299 and he has a
commission rate of 7%, how much commission does he earn on the sale of the
computer?
8. Kayla earns a week salary of $290 plus a 5.5% commission on sales at a
gift shop. How much would she make in a week if she sold $5700 worth of
merchandise?
9. Heather earns a commission of 5% on her weekly sales in a clothing shop.
What will her weekly commission be if she sells $7500 worth of clothing?
10. Your family takes a trip to the train station. The taxi fare is $17.85.
You pay the taxi driver an 18% tip. How much will he get for a tip?
11. Your neighbor pays $40 to have her lawn mowed and always adds a 15%
tip. You and your friend decide to mow the lawn together and split the
earnings evenly. How much will each of you earn?
12. You and your family go out for dinner and spend $125.00. You are going
to give the waitress a 20% tip. How much will you give her for a tip?
13. I went out to eat at the Outback Steakhouse with my family. Our bill
was $45.22. I left the waiter $9.95 for a tip. About what percent tip did I
leave?
14. Kelsey, Lauren, Thea, and Liz went to dinner at Red Robin. Each got a
beverage ($1.95) and a burger ($8.49). Including tax (6.25%) and tip (18%),
how much did the dinner cost in all? How much did each girl pay?
Name_____________________________________________________
Percents Quiz Review Worksheet
Find each percent increase or decrease. If necessary, round answers to the
nearest tenth.
1. 6 is increased to 18
2. 450 is decreased to 300
Find the new amount after each increase or decrease. Round to the nearest
tenth.
3. 25 is increased by 30%
4. 685 is decreased by 15%
Find the amount of sales tax and the total price (including sales tax) of the
item.
5. $18.50; 5% sales tax
6. $21.95; 6.25% sales tax
Find the amount of interest using the simple interest formula.
7. $475 at 8% for 2 years
8. $500 at 7.5% for 30 months
Find the amount of interest using the compound interest formula.
9. $475 at 8% for 2 years
10. $500 at 7.5% for 30 months
Solve the following problems. Don’t forget your labels!
11. Cameron borrowed $2500 at 7% simple interest for 3 years. How much
must he repay?
12. Chris deposited $2000 into an account that pays an interest rate of
5.7% compounded annually. She does not add or remove any money from her
account for 5 years. How much money will be in Chris’s account at the end of
the five years?
Find the percent error for each problem. Be sure to show all work. Round
answers to the nearest tenth.
13. Lynn measured the volume of her water before she drank it. She
measured the volume of the 16 ounce bottle to be 18 ounces.
14. Alex was asked to weigh a 250 g magnet on the balance scale. After
fooling around for a few minutes, he quickly weighed the object and
reported that is weighed 275 g.
Solve using an equation or proportion. If necessary, round answers to the
nearest tenth or nearest cent.
15. A car salesman makes a 6% commission on all of the merchandise that he
sells. How much merchandise does he have to sell in order to make $2700?
16. Hollister has a wool sweater bought a wool sweater from their supplier
for $37.95. They are going to mark it up 20%. How much will the sweater
cost in their store?