Question

By What Number Should-5/7 Be Divided So That The Result Is -15/28?

Evaluate : (32/15+8/5) Divided By (32/15-8/5)

Answer 1

plz see the attachment below

13.(32/15 + 8/5) ÷ (32/15 – 8/5)

= (32 × 1)/(15 × 1) + (8 × 3/5 × 3) ÷ (32 × 1)/(15 × 1) – (8 × 1)/(5 × 1) (∵ L.C.M. of 15, 5 = 15)

= {(32 + 24)/15} ÷ {(32 – 24)/15}

= 56/15 ÷ 8/15

= 56/15 × 15/8

= 7

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Answer 2

12) 3/4
13) 7

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