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3 August, 14:29

10.2 divided by (unknown number) = 0.8. Find the unknown number

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Answers (2)
  1. 3 August, 14:37
    0
    x = 12.75

    Step-by-step explanation:

    10.2 : x = 0.8

    x = 10.2 : 0.8

    = 102/10 : 8/10

    = 102/10 * 10/8

    = 102/8

    = 12.75
  2. 3 August, 14:55
    0
    12.75

    Step-by-step explanation:

    if 10.2 / y = 0.8,

    then 10.2/y = 0.8/1.

    (cross multiply), we have that

    10.2*1=9.8*y

    so, 10.2=0.8y

    (divide both sides by the coefficient of y)

    y=10.2/0.8

    y = 12.75
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