Profit percentage

The ratio of cost price to selling price is 20 : 21. What is the profit percentage?

Correct answer:

p =  5 %

Step-by-step explanation:

a:b = 20:21 a = 2120 b b = 2021 a  p = 100   aba  p = 100   a2021 aa  p = 100   120211 p = 100   (20211)  p=100 201=20100 1=20100=5%



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