Question

a drawing measuring 10cm by 16cm needs to be enlarged. the dimensions of the enlargement need to be 25cm by 40cm . calculate the enlargement needed and express it as a ratio
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Answer 1

Answer:

25 : 10 = 5(5) : 2(5) = 5 : 2

40 : 16 = 5(8) : 2(8) = 5 : 2

The enlargement needed is 5/2 - 1 = 1.5 = 150%