The word percent means per hundred. The sign of per cent is %.( PERCENTAGE )
x percent means x hundredths, written as x%.
Similarly if a student gets 20% marks, it means that he gets 20 marks out of 100 marks.( =20/100)
If a fraction number has denominator 100. It is known as percentage and its numerator is called as rate per cent.
Ram has Rs. 5000 and Ram gives Sam 20%. How much Sam get ?
Sam gets = 20% of 5000= 5000 * ( 20/100) = 1000/-
Percentage Increase / Percentage Decrease
(i) Percentage Change
% Change = (Final value – Initial value)*100 / (Initial value)
=change *100/initial value
(ii) Percentage Increase
Percentage Increase = (Increase value/Base value) × 100
(iii) Percentage Decrease
Percentage Decrease = (Decrease value/ Base value) × 100
Percentage increase/decrease is considered with respect to the Base Value (Initial Value) unless mentioned otherwise.
Example 2 :
The salary of Sachin increases from Rs. 50000 to Rs. 60000. Find the percentage increase in salary ?
Percentage Increase in salary =(60000-50000)*100 /50000
= 10000 *100/50000
= 20% .
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