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Ratios, Proportions, and Percentages Flashcards

7 cards from real BMST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  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?

    Answer: The 20 oz bottle

    12 oz = $0.15/oz; 20 oz = $0.14/oz, so the 20 oz bottle is cheaper per ounce.

  2. The ratio of red to blue marbles is 4:7. If there are 28 blue marbles, how many red marbles are there?

    Answer: 16

    4/7 = x/28, so x = 4 × 28 / 7 = 16.

  3. A worker earns $720 in 6 days. How much will the worker earn in 9 days at the same rate?

    Answer: $1,080

    Daily rate = 720/6 = $120; 120 × 9 = $1,080.

  4. What percentage of 250 is 75?

    Answer: 30%

    75 / 250 × 100 = 30%.

  5. A shirt originally costs $60. It is on sale for 15% off. What is the sale price?

    Answer: $51

    Discount = 0.15 × 60 = $9; sale price = 60 − 9 = $51.

  6. Two numbers are in the ratio 5:8. Their sum is 91. What is the larger number?

    Answer: 52

    Parts: 5 + 8 = 13; larger = (8/13) × 91 = 56.

  7. A solution is 20% salt by weight. How many grams of salt are in 350 grams of the solution?

    Answer: 70

    0.20 × 350 = 70 grams of salt.