Percent of a Number

Percents

100

40% of 70

28

200

15% of 100

15

300

150% of 20

30

400

6% of 35

2.1

500

132.5% of 16.6

21.995

Word Problems

100

Last year a pond had 16 fish. This year the amount of fish decreased by 25%. 

How many fish are in the pond this year?

12 fish

200

Mackenzie wants to buy a backpack that costs $50. If the tax rate is 6.5%, how much will she pay in tax?

$3.25

300

Mr. Sudimack earned a 4% commission on the sale of a new hot tub that he sold for $3755. How much did he earn?

$150.20

400

Suppose there are 20 questions on a multiple choice test. 25% of the answers are choice B - how many answers are NOT choice B?

15

500

In a recent year, 17.7% of households watched the finals of a popular reality series. There are 110.2 million households in the United States. How many households watched the finals?

about 19.5 MILLION

Fractions

100

Convert  5 3/4 to an improper fraction

23/4

200

Divide. Simplify if necessary.

3/4 ÷ 5/8

6/5 or 1 1/5

300

Convert 3 4/9 to an improper fraction

31/9

400

Divide. Simplify if necessary.

5/12 ÷ 10/18

3/4

500

Divide. Simplify if necessary.

4 2/9 ÷ 3 1/6 to an improper fraction

4/3 or 1 1/3

Miscellaneous

100

Percent is out of how much?

100

200

Find the area of a circle with a diameter of 6 cm.

9π cm or 28.28 cm

300

Find the circumference of a circle if the radius is 14 meters.

28π meters or 87.92 meters

400

The average white rhinoceros gives birth to a single calf that weighs about 3.8% as much as its' mother. If the mother rhino weighs 3.75 tons, ABOUT how much does the calf weigh?

0.16 tons

500

67.5% of 8.7

5.8725

Percent Equations

100

Do these equations represent an increase or a decrease?

1) c = b + 0.65b

2) c = (1+0.65)b

3) c = 1.65b

Increase

200

Write an equation for a 90% decrease.

1) c = b - 0.9b

2) c = (1-0.9)b

3) c = 0.1b

300

Write an equation for a 25% increase.

1) c = b + 0.25b

2) c = (1+0.25)b

3) c = 1.25b

400

Write an equation for a 6% increase.

1) c = b + 0.06b

2) c = (1+0.06)b

3) c = 1.06b

500

Write an equation for a 3.5% decrease.

1) c = b - 0.035b

2) c = (1-0.035)b

3) c = 0.965b