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27 September, 00:35

There are 156 students in 6 different classrooms. What is the ratio of students that classrooms? If there are 80 boys what is the ratio of boys to girls?

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  1. 27 September, 00:40
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    156-80=numb of girls

    numb of girls: 76

    Ratio of boys to girls=80:76

    =20:19

    Ratio of students in classrooms = 156:6

    =26:1

    (assuming that each classroom has the same number of students)
  2. 27 September, 01:01
    0
    The easiest way to find out ratios is to divide the total (in this case, students) by the divider (in this case, the classrooms).

    156 : 6 = 26

    The ratio of students to classrooms is 26 students per classroom, or 26 : 1.

    In this case, you need to figure out how many girls there are first.

    156 - 80 = 76

    Because you don't want to end up with a decimal, you need to find the GCF.

    The factors of 76 are: 1, 2, 4, 19, 38, 76

    The factors of 80 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

    Your GCF is 4, which is number you divide your total number of boys and total number of girls by.

    80 : 4 = 20

    76 : 4 = 19

    The simplest ratio of boys to girl is 20 boys for every 19 girls, or 20 : 19
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