Q511
A man spends 75% of his income, if his income increases by 28% and his expenditure increases by 20%, then what is the increase or decrease percentage in his savings?
A.
52% increase
AnswerB.
13% decrease
C.
13% increase
D.
52% decrease
Answer: Option A
Solution
Answer: Option A
Solution:
\begin{array}{l}
75 \to \frac{3}{4}\\
\begin{array}{*{20}{c}}
{{\rm{Income}}}&{}&{{\rm{Expenditure}}}&{{\rm{Saving}}}\\
{400}&{}&{300}&{100}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \downarrow + 28\% }&{}&{\,\,\,\,\,\,\,\,\,\,\,\,\, \downarrow + 20\% }& \downarrow \\
{112}& - &{60}&{ = 52\% }
\end{array}\\
{\rm{Saving}} = 52\%
\end{array}