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5 January, 13:17

Manuel's grade on a science quiz was 80%. He got 20 problems correct on the quiz. How many problems were on the science quiz?

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Answers (2)
  1. 5 January, 13:35
    0
    There were 25 problems on the science quiz

    Step-by-step explanation:

    1. Let's review the information provided to us to answer the question correctly:

    Grade Manuel got on the science quiz = 80% or 80/100

    Number of correct answers = 20

    2. How many problems were on the science quiz?

    Let's use the Rule of Three Simple, this way:

    Problems on the science quiz Percentage

    20 80

    x 100

    x * 80 = 20 * 100

    80x = 2,000

    x = 2,000/80

    x = 25

    There were 25 problems on the science quiz
  2. 5 January, 13:43
    0
    25

    Step-by-step explanation:

    20 x 100/80 = 25

    or 20/80 = x/100
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