Question

on selling a mobile for 750,a shopkeeper loses 10%.For what amount should he sell it to gain 5%

Answer 1

S.P. = Rs. 750
Loss % = 10%
C.P. = 750 - {(10/100) x 750}
        = 750 - 75
        = 675
S.P. to gain 5 % = 675 + {(5/100) x 675}
                          = 675 + 33.75
                          = 708.75
please check the answer if you have it.

Answer 2

loss percent =10%
10/100 * 750
total loss =75
shopkeeper has to sell the mobile for 750+75=825
to sell at 5% gain 5/100 *825=41.25
so he must sell for 866.25 to gain 5% on mobile
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