Percents (Lesson 1) Review

The word percent means "per hundred" or "hundredths."

Percents can be expressed as:
1.  A ratio in words.

2.  A fraction.  

To change a ratio in words to a percent follow the following steps:

1. Given the Ratio

2. Rewrite the ratio as a fraction.

3. Divide the numerator by the denominator.

4. Multiply by 100

5. Write your percent.

When the denominator does not equal 100 we follow the same steps to change a ratio in words to a percent.

Follow these steps:

1. Given the Ratio

2. Rewrite the ratio as a fraction.

3. Divide the numerator by the denominator.

4. Multiply by 100

5. Write your percent.

To rewrite a fraction as a percent:

1. Write the fraction.

2. Divide the numerator by the denominator

3. Multiply your answer by 100.

4. Rewrite your percent.

We can go in reverse and change a percent to a fraction.

1. Write the number over 100.

2. Simplify the fraction.

Recall: Hundredths = Percent

Decimals can easily be changed to a percent simply by multiplying by 100.

(Move the decimal to the right 2 places.)

To change a percent to a decimal simply divide by 100. (Move the decimal place 2 places to the left.)