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Rohit kumar

· started a discussion

· 1 Months ago

problem (Question: 79728.0 )

sir math question is not shown proper way..

Question:
A men spends 80% of his income. With an increase in the cost of living, his expenditure increases by 37 \(\cfrac{1}{2}\)  % and his income increase by 16 \(\cfrac{2}{3}\) %. His present percent saving are.
Options:
A) 5 \(\cfrac{3}{7}\)%
B) 5 \(\cfrac{5}{7}\) %
C) 6 \(\cfrac{2}{3}\) %
D) 6 \(\cfrac{1}{3}\) %
Solution:
Ans: (b) Let original income be Rs.100
Expenditure = Rs.80
Saving = Rs 20
Increase in expenditure = \(\cfrac{75}{2}\)%
New expenditure = Rs.(80+30) = Rs.110
Increase in his income = 16 \(\cfrac{2}{3}\) %
Present income =  \(\cfrac{350}{3}\) 
Present saving \(\left ( \cfrac {350}{3} -100 \right )=\cfrac{20}{3}\) 
Required percentage saving = Rs \(\cfrac{\cfrac{20}{3}}{\cfrac{350}{3}}\times100\)
\(\cfrac{\cfrac{20}{3}}{\cfrac{350}{3}}\times100=\cfrac{20}{3}\times\cfrac{3}{350}\times100\)
\(\cfrac{40}{7}=5\cfrac{5}{7}\%\)

Knowledge Expert

· commented

· 1 Months ago

Hi Rohit, let it to be loaded it may be fraction....
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