Percents, Proportions, & Discounts

Proportion

100

What is the first step of solving a proportion?

cross multiplying

200

Solve the proportion: 6/8 = 18/x

x = 24

300

Solve the proportion: 24/x = 168/7

x = 1

400

If 20 chips have 50 calories, how many chips would contain 100 calories?

40 chips

500

If 5 lafufus cost $65, how much would 3 lafufus cost?

$39

Percent

100

5 is what percent of 8?

62.5%

200

18 is 20% of what number?

90

300

What is 30% of 45

13.5

400

100 people like movies while 56 people like TV shows. What percent of people like movies?

64%

500

10 kids prefer blue while 8 prefer green and 2 prefer red. What percent of kids  DO NOT prefer green?

60%

Discount, Tip, & Tax

100

What is the first step on problems with tip, tax, or discounts?

Add, subtract, multiply, or divide

Multiply

200

How do you put 20%  into your calculator if it doesn't have a percent key?

0.2 or 0.20

300

Price= $8.99 and Tax = 7%

Find the total cost

$9.62

400

An item costing $24 is on sale for 30% off.  What will the sales price be?

$16.80

500

An item costing $30 is on sale for 20% off.  If a tax of 5% is added at the end, what is the final cost?

$25.20

Percent Change

100

New: $10

Old: $25  Is this an Increase or Decrease?

Decrease

200

Original cost:  $25

New cost: $20

Find the Percent Change

20%

300

Find the percent change if Jada went from having 20 calico critters to 50 calico critters

150%

400

Jimmy went from 6 hours a day on his phone to 7 hours a day.  Find the percent change.

about 17% increase

500

A shirt is on sale for $21.99.  If it used to cost $29.99, what is the percent of discount?

27% or 26.7% or 26.68%