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28 March, 13:06

In this year's

7

th

7th

grade class, there are 4 boys for every 5 girls. How many girls are in the class if there are 20 boys in the class?

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Answers (1)
  1. 28 March, 13:11
    0
    The answer to your question is 25 girls

    Step-by-step explanation:

    Data

    4 boys for every 5 girls

    20 boys? number of girls

    To solve this problem use proportions

    Number of boys : Number of girls : : New number of boys : New number of

    girls

    Substitution

    4 : 5 : : 20 : x

    Solve for x

    x = (5 x 20) / 4

    Simplification

    x = 100 / 4

    Result

    x = 25

    There are 25 girls
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