Percents, Decimals and Fractions

Mrs. Kuznia

Math 8

Day 11

Place Value

1 2 3. 4 5 6 7 8

Say:

.5= .36=.745=126.23=

Converting

1. Decimals to Fractions Use the place value to make a fraction,

then reduce!!

Example: Convert to fraction.

• .5 or “5 tenths”

Examples

Convert the following to fractions.

.36

.745

Fractions to Decimals

Just divide the numbers. Example:

5

21

More examples

Convert the following to decimals:

9.

11

12

5

Decimals to Percents

Move the decimal two spaces to the right, and add a percent sign

Example:

0.35=

More examples

Convert to percents:

0.3

12.57

0.03

Percents to decimals

Move the decimal point two spaces to the left, and drop the percent sign.

Example:

127%

More examples:

73%

6%

0.25%

Fraction to percents:

Set up a proportion with “x over 100”

Example:

More Examples

Convert the following fractions to percents.

Percents to fractions:

Put the percent over 100, then reduce.

Example

35%

More Examples:

Convert to fractions:

120%

8%