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math

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if a 1/2 kilogram of beef costs £1.60 work out the coast of 3/4 of a kilogram.

  • math -

    1/2 kg costs £1.60
    1 kg costs £3.20

    3/4 kg costs £ (3/4)(3.2) = £ 2.40

    or

    set up a proportion:

    .5/1.6 = .75/x
    .5x = 1.2
    x = 1.2/.5 = 2.4

  • math -

    Thank You very much.

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