Find total percentage by which 4/5 of 70 less than 5/7 of 112

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Solution

Four fifth of 70
= 4/5 × 70
= 56

five seventh of 112
= 5/7 × 112
= 80

% lesser
= (80 - 56)/80 × 100%
= 24/80 × 100%
= 30%

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(1) a : b = 2 : 5

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