Fractions to Percentage
Percent of
Increase/decrease
Percentages and Indices
Repeated change
100

What is 9/10 as a percent?

90%

100

Find 10% of 40

4

100

Increasing by 23% is the same as finding ________%

123%

100

687 x 1.187

This shows 687 being increased by ________%  _______ times.

This shows 687 being increased by 18%  7 times.

100

increasing by 10% twice is the same as increasing by ___%

21%

200

What is 3/4 as a percent?

75%

200

Find 25% of 840

210

200

Decreasing by 30% is the same as finding ________%

70%

200

Emma invests 380 pounds for 6 years at 2% interest per year.  How much does she have after 6 years?

380 x 1.066=539.04

200

Increasing by 70% twice is the same as increasing by _____%

189%

300

What is 3/20 as a percent?

15%

300

Find 80% of 375

300

300

Increase 534 by 12% in one calculation.  Show your calculation

534 x 1.12 = 598.08

300

Decrease 5400 by 2% 100 times.

Round your answer to 2 decimal places.

5400 x .98100=716.15

300

Increasing by 50% and then decreasing by 50% is the same as finding ______%

75%

400

What is 89/92 as a percent?

96.7%

400
Find 3% of 8475

254.25

400

Decrease 425 by 94% in one calculation. Show your calculation.

425 x 0.06 = 25.5

400

Increase 359 by 10% 9 times and then decrease it by 10% 9 times.

359 x 1.19x 0.99 = 327.95

400

Increasing by 45% and decreasing by 31% is the same as finding ____%

100.05%

500

What is 93/12 as a percent?

775%

500

Find 0.5% of 72

0.36

500

Increase 109 by 24% and then decrease it by 80%. Show your calculations.

109 x 1.24 x 0.2 = 27.032

500

Show, using only one multiplication sign, how you could increase a number by 500% 12 times and then increase it by 2500% 2 times.

x 516

500

increasing a number by ____% and then decreasing by _____% is the same as finding 12%

1.2 x .1 = 0.12


So, increase by 20%, decrease by 90%

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