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? Choose the most appropriate option:
A) 20%
B) 25%
C) 50%
D) 75%
E) 60%
Let original income = $100   expenditure = $75   savings = $25   new income = $120   new expenditure = $110/100 * 75 = $165/2   New savings = 120 - 165/2 = $75/2   Increase in savings = 75/2 - 25 = $25/2   Increase % = 25/2 * 1/25 * 100= 
<gadget id="calculator">25/2 * 1/25 * 100</gadget>
<output>50</output>
50%   Answer is 50%
<result>C</result>
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?