Question

by selling an article for Rs 680 ,sameer loses Rs 50 . at what price must he sell the article to gain 15 percent

Answer 1

firs find main price = 680+50= 730

gain 15 find

730×15/100= 109.5

= 730+109.5
= 839.5

839.5 price must he sell the article to gain 15 percent

Answer 2

S.P = 680, Loss = Rs 50, C.P = S.P - Loss = 680 - 50 = 630

C.P = 630, P% = 15% S.P = ?

S.P = (1+ P%/100) of C.P 
       = (100 + 15/100) of 630
       = (115/100) of 630   
       = 23/2 x 63
       = 724.5 [ ans.]