Question

what number must be subtracted from each term of the ratio 8:11 to make it 4:5?​

Answer 1

Let the number to be added be x

then (8 + x) : (11 + x) = 4 : 5

(8 + x) / (11 + x) = 4 / 5

Cross multiplication

5 (8 + x) = 4 (11 + x)

40 + 5x = 44 + 4x

5x - 4x = 44 - 40

x = 4

Answer the number 4 has to be added to each term to make ratio 8 : 11 to 4: 5
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