The books for Mathematics, Geography and Science in a school are in the ratio 5:7:8. There is a proposal to increase these books by 40%, 50% and 75% respectively. What will be the ratio of the increased books?

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1 answer

original:
number of math books -- 5x
number of geogr books -- 7x
number of science books - 8x

new numbers:
math ----- 1.4(5x) = 7x
geography-- 1.5(7x) = 10.5x
science ----- 1.75(8x) = 14x

new ratio
= 7x : 10.5x : 14x
= 7 : 10.5 : 14
= 14 : 21 : 28
= 2 : 3 : 4