Question

If the Cost Price of 20 books is equal to the selling price of 18 books, find the gain or loss percent ? ​

Answer 1

☆Answer☆

Let SP be 'x' and CP be 'y'.

Now,

20y = 18x

x = (10/9)y

Gain % = (SP-CP)×100/CP

=> (x-y)100/y

=> (10/9)y-y×100/y

=> (10/9)-1×100

=> (100/9)%

Hence, Gain Percentage is (100/9)%.

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