arvind spends 75 of his income his is increased by 20..., Percentage, General Mathematics

Question:Arvind spends `75%` of his income. His income is increased by `20%` and he increased his expenditure by `10%`. His savings are increased by :

A `10%` 
B `25%` 
C `37 1/2%` 
D `50%`

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+ AnswerD

+ ExplanationLet income `= 100` Expenditure 

`= 75 &` Savings

`= 25.`

New income 

`= 120,` New expenditure

`= (110/100 xx 75)`

`= 165/2`

New savings

`= (120 - 165/2)`

`= 75/2.`

Increase in savings

`= (75/2 - 25)`

`= 25/2.`

Increase percent

`= (25/2 xx 1/25 xx 100)%`

`= 50%`

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