7th RtI - Percent Equation

Percent Equation

Finding the percent of a number

What is a percent?

1. Percent just means part of 100

2. A percent is a ratio that compares a number to 100

3. Percents can be expressed as decimals or fractions

Multiple Choice

What does the word percent mean?

• part out of 10

• part out of 1

• part out of 100

• part out of 1000

Finding Percents of a Number: Method 1

1. Write the percent as a fraction over 100.

2. Multiply the quantity times the fraction.

3. Simplify your answer.

Multiple Choice

25% is what fraction in lowest terms?

• 1/4

• 25/100

• 2/5

• 1/5

Multiple Choice

Using method 1, what would be 15% of 80?

• 53

• 12

• 48

• 25

Finding Percents of a Number: Method 2

1. Write the percent as a decimal by dividing the percent by 100 or moving the decimal point 2 places to the left.

2. Multiply the decimal by the quantity.

Multiple Choice

Using a percent equation (Method 2), what is 20% of 15?

• 3

• 5

• 7

• 9

Multiple Choice

Using a percent equation, what is 9% of 50?

• 4.5

• 45

• 10.5

• 15

Multiple Choice

Using Method 2, what is 75% of 82?

• 41

• 64

• 61.5

• 52.5

Multiple Choice

Let's switch things up. See if you can use a percent equation to solve the following problem.

15 is what percent of 60?

• 12%

• 20%

• 25%

• 40%

Multiple Choice

Let's try one more.

What percent of 50 is 12?

• 12%

• 24%

• 30%

• 18%