Ratios Proportions and Percents

Ratios

100

Write the ratio 3:7 in two other ways

3 to 7 and 3/7

200

There are 91 people in 4 buses. Write the ratio of people to buses.

91: 4, 91 to 4 or 91/4

300

Simplify the ratio - 12:18

2:3

400

Simplify the ratio - 35:50

7:10

Proportions

100

What is a proportion?

an equation that states two ratios are equal.

200

Solve this proportion.

4/5 = x/10

x= 8

300

Solve this proportion.

3/8 = x/32

x= 12

400

In a classroom, there are 5 teachers for every 60 students. If the school enrolls 180 students, how many teachers will be needed to maintain the same ratio?

x= 15

500

A painter can paint 240 square feet of fence in 4 hours. How many square feet can they paint in 10 hours at the same rate?

x= 600

Percent to Decimal

100

Write this percent as a decimal. 18%

.18

200

Write this percent as a decimal. 73%

.73

300

Write this percent as a decimal. 105%

.105

400

Write this percent as a decimal. 5%

.05

500

Write this percent as a decimal. 7.3%

.073%

Percents of #s

100

What is 25% of 80?

20

200

What is 15% of 200?

30

300

What is 6% of 20?

1.2

400

A jacket costs $80, and it is on sale for 25% off. How much is the discount?

The discount is $20

500

A pair of shoes costs $120. The sales tax is 8%. How much is the tax?

The tax is $9.60