Calculator Percents
Mental Math Percents
Mental Math Proportions
Rates
Taxes and Tips
Word Problems
100

58% of 240

139.2

100

50% of 60

30

100

3/5 = x/25

x=15

100

At Turner's last swim meet, he swam 100 meters in 125 seconds. What was his swimming speed (in meters per second)?

0.8 m/s

100

If the tax rate is 10%, what is the tax on a $20 purchase?

$2

100

Dustin got 7 out of 10 questions right on his history quiz. What percent is this?

70%

200

17% of 65

11.05

200

20% of 40

8

200

x/50 = 100/25

x=200

200

Ms Wade graded 90 exams in 60 minutes. What is the unit rate, in exams per minute?

1.5 exams / min

200

How much is a 20% tip on a $45 bill?

$9

200

Riya's pokemon collection has 240 fighting-type cards, out of a total of 300. What percent is this?

80%

300

99.2% of 450

446.4

300

1% of 300

3

300

20/x = 140/35

x=5

300

Roman can type an average of 60 words per minute. At this rate, how long will it take them to write a 5000-word essay?

$100 bonus: What is this time written as HH:MM:SS?

83.bar3 " minutes"

(1:23:20)

300

How much is a 20% tip on a $550 banquet?

$110
300

Artemis got every single question correct on their 30-point test, in addition to 6 bonus points. What is their score as a percent?

120%

400

439% of 8

35.12

400

5% of 120

6

400

18/10 = 54/x

x=30

400

Mr Johnson drives 10 miles to get to school in the morning, at an average speed of 40 mph. How many minutes does he spend driving?

15 minutes

400

What is the total amount paid (including 11% tax) on a $150 purchase?

$166.50

400

Mona promised to meet her friend in 20 minutes at a restaurant 15 miles away. If she drives at a constant speed, how fast does she need to drive to get there in time?

45 mph

500

0.043% of 85

0.03655

500

15% of 200

30

500

100/45=x/18

x=40

500
Fido the toy poodle eats 150 grams of food in a day. How long will it take to get through a giant 20-kilogram bag of dog food, rounded to the nearest week?

19 weeks

500

What is the total paid for a $85 dinner, including 12% tax and a 20% tip?

(Reminder: tax and tip are both calculated from the original amount!)

$112.20

500

A small community has a population of 132, making up 0.008% of the population of their country. What is the total population of the country?

1,650,000