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Ravi's salary before he got an increment was 20% of total income of of his family.His increment was one fourth of his salary after increment.What percentage of total income of his family is his new salary
in Quantitative Aptitude by (284 points) 4 10 26 | 567 views

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  • Let total family income be                          :         $x$
  • Ravi`s increment be                                     :         $y$
  • Then Ravi`s income before increment    :        $0.2x$

    $Increment \ value  : = $ $\frac{1}{4} \times (0.2x+y)=y \\  y= \frac{0.2x}{3} $

            $New \  salary = \frac{0.2x}{3}+0.2x = \frac{0.8x}{3}$


  New salary in terms of family income = $\LARGE \frac{\frac{0.8x}{3}}{x+\frac{0.2x}{3}} $$\times 100=25\%$


Note : Ravi is also part of family therefore increment in Ravi`s salary will also increase his family income.
 

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