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- Basic Math and Science Ratios, Proportions, and Percentages Questions and Answers 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.

Read the first 7 - Basic Math and Science Ratios, Proportions, and Percentages Questions and Answers flashcards as text

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

    Answer: $20.16

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

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

    Answer: 20

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

  3. 15 is what percent of 60?

    Answer: 25%

    15 / 60 × 100 = 0.25 × 100 = 25%.

  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?

    Answer: 5 liters

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

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

    Answer: 40

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

  6. A tank is 40% full and contains 120 gallons. What is the total capacity of the tank?

    Answer: 300 gallons

    120 = 40% × capacity → capacity = 120 / 0.40 = 300 gallons.

  7. Two numbers are in the ratio 7:3. If the larger number is 56, what is the smaller number?

    Answer: 24

    7 parts = 56, so 1 part = 8; the smaller number = 3 × 8 = 24.