Question

If the selling price of 10 pen is equals to the buying price of 8 pen . Find the percentage of profit or loss ?

Answer 1

10 SP = 8 CP

SP/CP = 8/10 ; or 4/5

means SP = 4, CP= 5 then loss% = (1/5)×100 = 20%

Answer 2

Your answer ⤵️

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Given sp=220 and loss=12%

so, the CP = (220*100)/88 =250 Rs

now the new profit is 10% and cp is 250 Rs

and we have to find by how much amount as compared to earlier the SP will be more so as to gain profit of 10%.

so SP= (250*110)/100 =275 Rs

now increase in amount= 275–220 = 55 Rs