NIFT UG 2012 Question Paper with solutions

Question : 133 of 150

Marks: +1, -0

Two numbers are 20% and 50% more than a third number respectively. What percentage is the first of the second?

Solution:

x+{20x}/{100}=x+{x}/{5}=\;\;{6x}/{5}

x+{50x}/{100}=x+{x}/{2}={3x}/{2}

{{6x}/{5}/{3x}/2}%={4}/{5}\%=80%

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