TIP-4

If 'a' articles are bought for Rs 'b' and  'c' articles are sold for Rs 'd'.

Then profit or loss made by the vendor:

a x d - b x c

b x c

 x 100

Example 1:

If a man purchase 11 orange for Rs 10 and sell them 10 for Rs 11. How much profit or loss did he made?

solution:

Profit or loss made :

11 x 11 - 10 x 10

10 x 10

 x 100 = 21%

Example 2:

A boy buys orange 9 for Rs 16 and sell them 11 for Rs 20. Find profit or loss percent.

solution:

profit or loss percent made :

9 x 20 - 11 x 16

11 x 20

 x 100 = 25/11 %.