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

Answer 1

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

Answer 2

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