Paulson spends 75% of his income . His income is increased by 20% and he increased his expenditure by 10%. Find the percentage increase in his savings.
Let original income = Rs. 100 . Then , expenditure = Rs. 75 and saving = 25
New income = Rs 120, New expenditure = Rs.`(110/100 xx 75)` = Rs. `165/2`
New saving = Rs. `(120 - 165/2)` = Rs. `75/2`
Increase in savings = Rs. `(75/2 - 25)` = Rs. `25/2`
`:.` Increase % = `(25/2 xx 1/25 xx 100)`% = 50%
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