BMST Ratios, Proportions, and Percentages 3 — Questions and Answers
Question 1: A store sells juice in two sizes: a 12 oz bottle for $1.80 and a 20 oz bottle for $2.80. Which is the better unit price?
- The 12 oz bottle
- The 20 oz bottle (Correct answer)
- They are equal
- Cannot be determined
Correct answer: The 20 oz bottle
12 oz = $0.15/oz; 20 oz = $0.14/oz, so the 20 oz bottle is cheaper per ounce.
Question 2: The ratio of red to blue marbles is 4:7. If there are 28 blue marbles, how many red marbles are there?
- 12
- 14
- 16 (Correct answer)
- 18
Correct answer: 16
4/7 = x/28, so x = 4 × 28 / 7 = 16.
Question 3: A worker earns $720 in 6 days. How much will the worker earn in 9 days at the same rate?
- $960
- $1,000
- $1,080 (Correct answer)
- $1,200
Correct answer: $1,080
Daily rate = 720/6 = $120; 120 × 9 = $1,080.
Question 4: What percentage of 250 is 75?
- 25%
- 28%
- 30% (Correct answer)
- 35%
Correct answer: 30%
75 / 250 × 100 = 30%.
Question 5: A shirt originally costs $60. It is on sale for 15% off. What is the sale price?
- $45
- $48
- $51 (Correct answer)
- $54
Correct answer: $51
Discount = 0.15 × 60 = $9; sale price = 60 − 9 = $51.
Question 6: Two numbers are in the ratio 5:8. Their sum is 91. What is the larger number?
- 35
- 52 (Correct answer)
- 56
- 64
Correct answer: 52
Parts: 5 + 8 = 13; larger = (8/13) × 91 = 56.
Question 7: A solution is 20% salt by weight. How many grams of salt are in 350 grams of the solution?
- 60
- 65
- 70 (Correct answer)
- 75
Correct answer: 70
0.20 × 350 = 70 grams of salt.
BMST Ratios, Proportions, and Percentages 3
A store sells juice in two sizes: a 12 oz bottle for $1.80 and a 20 oz bottle for $2.80.
Which is the better unit price?