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Tuesday, 23 August 2016

How to solve Percentage Questions Short trick

Question- If income of Ravi is 25% more than that of Ram, then income of Ram is how much percent less than that Ravi?

This question should be answered within 5 seconds.

Traditional Method- Let Ram's income be 100
Then, Ravi's income = 125
Required percentage =( (125-100)/125)x100%=20%


Short Tricks-
25% = 1/4
we have to find Ram is how much percent less than that of  ravi. Focus on the word less.
In order to make the fraction less we have to increase the denominator. Again one question arises by how much we have to increase the denominator?
we have to increase the denominator by the numerator. i.e. here the numerator is 1.
So, 1/(4+1) = 1/5 i.e 20 %

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