Download Unit 17 - Madison College

MTM 2 Notes
Unit 17
Page 1 of 5
Unit 17: Introduction to Percents
Big Idea: Percents are just another way of representing a fraction.
Big Skill: You should be able to convert between percents, decimal fractions, common fractions, and mixed
numbers.
Definition of Percent: A percent (%) indicates the number of hundredths of a whole.
1
 0.01  1%
1 part of 100 parts 
100
To convert a decimal fraction to a percent: move the decimal two places to the right, then add the % symbol.
Practice:
1. Express 0.0987 as a percent.
2. Express 0.526 as a percent.
3. Express 2.995 as a percent.
To convert common fractions and mixed numbers to a percent: use a calculator to express the number as a
decimal fraction, then convert that decimal to a percent.
5
4. Express as a percent.
8
5. Express 3
1
as a percent.
6
MTM 2 Notes
Unit 17
Page 2 of 5
To convert percents to decimal fractions: drop the % symbol, then move the decimal two places to the left.
6. Express 52% as a decimal fraction.
1
7. Express 12 % as a decimal fraction.
8
4
8. Express 15 % as a decimal fraction.
9
To convert percents to common fractions: express the percent as a decimal fraction, then find the common
fraction equivalent of the decimal (and reduce).
9. Express 62.5% as a common fraction.
10. Express 0.25% as a common fraction.
3
11. Express 359 % as a common fraction.
4
MTM 2 Notes
Unit 17
Page 3 of 5
Practice: Calculate the absolute and incremental positioning for the hole centers labeled in the diagram below.
Hole
1
Absolute Positioning
x
y
Hole
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
Incremental Positioning
x
y
MTM 2 Notes
Calculations for Hole #1:
x1 =
y1 =
Calculations for Hole #2:
x2 =
y2 =
Calculations for Hole #3:
x3 =
y3 =
Calculations for Hole #4:
x4 =
y4 =
Calculations for Hole #5:
x5 =
y5 =
Unit 17
Page 4 of 5
MTM 2 Notes
Calculations for Hole #6:
x6 =
y6 =
Calculations for Hole #7:
x7 =
y7 =
Calculations for Hole #8:
x8 =
y8 =
Calculations for Hole #9:
x9 =
y9 =
Calculations for Hole #10:
x10 =
y10 =
Unit 17
Page 5 of 5