Percentage means per cent or per 100
A percentage is a number or ratio which is expressed as a fraction of 100.
Ex. 30%=30/100
1.
If we have to convert a fraction into % than that number is multiply by 100.
Example
Change 2/5 into percentage.
=2/5×100
=40%
=2/5×100
=40%
2.
If we have to convert % into fraction than that number is multipy by 100
Example
Example
Chnage 25% into fraction.
=25/100
=1/4
=25/100
=1/4
3.
A is 
% of 'B'.
% of 'B'.
Example
45 is what % of 54?
=83.33%
=83.33%
4.
If 'X' is a% more than 'Y', then 'Y' is 
% less than 'X'.
Example
% less than 'X'. Example
If the salary of Ram is 25% more than shyam's salary. Find how much % Shyam's salary is less than Ram's salary?
=20%
=20%
5.
If 'X' is a% less than 'Y', then 'Y' is 
% more than 'X'.
Example
% more than 'X'. Example
If Mohan's height is 10% less than Sohan's height. Find how much % Sohan's salary is more than Mohan's salary?
11.11%
11.11%
6.
If the population is 'P' and it is incearsed by 'R%' every year then the population of village after 'n' years is
Example
Example
If the poputation of a city is 1.2 Lakh and it is increased by 10% every year. What will be the total population of that village after 2 years?
=145200
=145200
7.
If the population is 'P' and it is incearsed by 'R%' every year then the population before 'n' years is
Example
Example
If the poputation of a city is 119025 and it is increased by 15% every year. What will be the total population of that village before 2 years?
=90000
=90000
8.
If the price of a machine is x rs. and it is depriciated by 'R%' every year then the price of machine after 'n' years is
Example
Example
If the price of a T.v. is 20000 and it is depriciated by 20% every year. What will be the the price of that T.v. after 2 years?
=12800
=12800
9.
If the price of a machine is x rs. and it is depriciated by 'R%' every year then the price of machine before 'n' years is
Example
If the price of a Computer is 8100 rs. and it is depriciated by 10% every year. What was the price of that T.v. before 2 years?
=10000
=10000
10.
If the price of any foodstuff is increased by 'a%' then the comsumption of it will be decreased by 
% so that the expenses of this item is remain same.
Example
% so that the expenses of this item is remain same. Example
The price of sugar is increased by 10%. How much % consumption of sugar is decreased so that the expenditure of sugar is same?
=9.09%
=9.09%
