By selling a badsheet for 640 rupees. A shopkeeper earns a profit of 28% . How much did it cost shopkeeper ? It's solutions
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C.P.=S.P. ×100/100+profit%
=640×100/100+28
=64000/128
=500₹
=640×100/100+28
=64000/128
=500₹
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easy way to solve it ..
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