IMSA Ratios, Proportions, and Percentages 2

Question 1

The ratio of red to blue marbles is 5:3. If there are 40 red marbles, how many blue marbles are there?

Accepted Answer

24

Answer

20

Answer

16

Answer

32

Question 2

A salesperson earns a 6% commission on sales. How much commission does she earn on $4,500 in sales?

Accepted Answer

$270

Answer

$225

Answer

$300

Answer

$240

Question 3

Two quantities are in the ratio 7:9. If the larger quantity is 63, what is the smaller?

Accepted Answer

49

Answer

42

Answer

56

Answer

45

Question 4

A school's enrollment increased from 800 to 920 students. What is the percent increase?

Accepted Answer

15%

Answer

12%

Answer

18%

Answer

10%

Question 5

If 3/4 of a number is 60, what is 25% of the same number?

Accepted Answer

20

Answer

15

Answer

25

Answer

30

Question 6

A map uses a scale of 1 inch = 25 miles. If two cities are 3.5 inches apart on the map, what is the actual distance?

Accepted Answer

87.5 miles

Answer

75 miles

Answer

100 miles

Answer

62.5 miles

Question 7

After a 15% increase followed by a 10% decrease, what is the net percentage change from the original value?

Accepted Answer

3.5% increase

Answer

5% increase

Answer

3.5% decrease

Answer

5% decrease