Question

5. What should be subtracted from the sum of 7/8 and 4/15 to get 9/40
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Answer 1

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Answer 2

Let the number be ‘x’,then,
[(7/8)+(4/15)]-x=(9/40)

LCM of 8 and 15 is 120.So,
(7/8)+(4/15)=>105+32/120=>137/120 ____(1)

(137/120)+x=9/40=>x=(9/40)-(137/120)=27-137/120=-110/120=>-11/12


So,this final answer is x=-11/12