Percentage means "out of 100".
To calculate percentage of something, you have to how much you have out of something. And multiply it by 100
1. let's say you got 18 marks out of 20. How much percentage of marks did you get?
You got 18, out of 20. So you got
% of marks = %
2. Similarly, If you get 120 marks out of 150, then % of marks you got is %
3. Let the price of an object increased from Rs. 1000 to Rs. 1050. You have to calculate the percentage increase in price.
Increase in price = 1050 - 1000 = 50
Rs. 50 increased in Rs. 1000
% increase = %