Chapter 5Percents

Topics•Converting between fractions,

decimals, and percents•Solving Percent Problems

Converting Decimals to Percents

Move the decimal point two places to the right

.67 67%

Try to change these decimals to percents.

.82.375.005

.41.5

82%

37.5%0.5%40%

150%

Converting Percents to Decimals

Move the decimal two places to the left

42% .42

63.2% .632

Try to change these percents to decimals.

42%17%13.75%5%0.7%327%

.42

.17.1375.05

.0073.27

This is the way I think about it..

Converting Percents to Fractions•Take your percent and make it into a fraction with the denominator of 100•Reduce your fraction the simplest form or mixed number form if necessary

Change these percents to fractions.

20%

17%

110%

Converting Fraction to Percent•Take your fraction and make it into a

division problem

Try to change these fractions to percents

Try to change these fractions to percents

Decimal to Fraction.32 =

.122 =

.5 =

Fraction to Decimal

Fraction to Decimal

Practice Problems

Change to Decimals

Practice Problems

Change to Fractions

Practice ProblemsChange to Percent

Practice ProblemsChange to Percent

Percent Problems IS % OF 100

50% OF 70 IS 35

What is 2.5% of 280?

Validation:

5 is 10% of what #?

30 is what percent of 120?

Practice Problems10% of 60 is what #?70% of 35 is what #?10 is what % of 25?12 is what % of 240?17 is 20% of what #? 115 is 25% of what #?

624.5405

85460