Question
Monthly income of P is Rs.10000 and his monthly savings
is Rs.2200. If his monthly income is decreased by 30% and monthly expenditure is decreased by 20% then find the approximate percentage decrease in his monthly savings.Solution
Expenditure of P = Rs.(10000 – 2200) = Rs.7800 New Saving = (0.7 × 10000 - 0.8 × 7800) = 7000 - 6240 = Rs.760 Decrease % in Saving = [(2200 - 760)/760] × 100 = 65%
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