BMST - Basic Math and Science Ratios, Proportions, and Percentages Questions and Answers 5

Question 1

A worker earns $18 per hour. After a 12% raise, what is the new hourly wage?

Accepted Answer

$20.16

Answer

Raise = 12% × $18 = $2.16; new wage = $18 + $2.16 = $20.16.

Question 2

The ratio of red to blue marbles is 5:4. If there are 36 marbles total, how many are red?

Accepted Answer

20

Answer

Total parts = 9; red = 5/9 × 36 = 20 marbles.

Question 3

15 is what percent of 60?

Accepted Answer

25%

Answer

15 / 60 × 100 = 0.25 × 100 = 25%.

Question 4

A chemical solution requires a 1:4 ratio of acid to water. How many liters of acid are needed to make 25 liters of solution?

Accepted Answer

5 liters

Answer

Acid = 1/(1+4) × 25 = 1/5 × 25 = 5 liters.

Question 5

If 30% of a number is 24, what is 50% of the same number?

Accepted Answer

40

Answer

The number = 24 / 0.30 = 80; 50% of 80 = 40.

BMST - Basic Math and Science Test Practice Test