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math

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Solve each proportion. Where necessary, round to the nearest tenth.

4/3 = b/21
I know b=28
do I round to the nearest tenth or what?

  • math -

    28 is a whole number, so b = 28.

    Your instructions say round where necessary. It's not necessary here.

  • math -

    (4/3)=(b/21) Multiply with 21
    21*(4/3)=b
    b=(21*4)/3
    b=(84/3)
    b=28

    28=4*7
    21=3*7
    (28/21)=(4*7)/(3*7)=(4/3)

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