Question
Rahul saves 36% of his monthly income. If his monthly
income increases by 18.2% while his monthly savings remain the same, find the increase in his monthly expenditure.Solution
ATQ,
Let the monthly income of Rahul be Rs. 100x.
So, monthly savings of Rahul = 0.36 × 100x = Rs. 36x
Monthly expenditure of Rahul = 100x – 36x = Rs. 64x
Monthly income of Rahul after increase = 1.182 × 100x = Rs. 118.2x
Monthly expenditure of Rahul after increase = 118.2x – 36x = 82.2x
Desired percentage = [(82.2x – 64x)/64x] × 100 = 28.44%
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