Question

S.P. of 5 mangoes is the same as the C.P. of 7
mangoes. Find the gain percent.
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Answer 1

let the c.p of mangoes=x

so c.p of 7 mangoes=7x

let the s.p of 5 mangoes=7x(as s.p of 5 mangoes is equal to c. p of 7 mangoes)

so c.p of 5 mangoes=5x

gain= s.p-c.p =7x-5x=2x

     gain %= (gain/c.p)*100%

                =(2x/5x)*100%

                =40% ANSWER