Question

a shopkeeper sold two pairs of jeans for Rs 720 each gaining 20% on one and losing 20% on the other. find his gain or loss %

Answer 1

Hi friend,

His selling price is 720.he got gain on first one 20%.second one 20%.so we have to find c.p fist of all by using c.p=s.p (100+g/100) for first one.
C.p=s.p(100-l/100) for second one
And add both c.p and add s.p also and compare them and find the loss or gain percentage..

If it is any competitive exam
Then product gain and loss percent and divide it by hundred.if gain and loss percent for two things are equal than it is loss.

For this question:

(20×20)÷100=4% loss

Answer 2

hope it helps..
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