Question

Kailash spends 75% of his income his expenditure is increased by 10% and income by 20% how much would his saving increase in percentage

Answer 1

Let income =X

Expenditure = X×75/100= 3X/4

Savings = X/4

Now______________________

income = X +X×20/100 =6X/5

Expenditure=3X/4 ×110/100=33X/40

Savings =15X/40

Increase in savings = 15X/40-X/4

===========5X/40

%%% =( 5X/40)/ X/4 ×100

=====50%

answer - 50%

Answer 2

Answer:

50 %

Step-by-step explanation:

Let his original income be x

We are given that Kailash spends 75% of his income

Expenditure = $\frac{75}{100}x=0.75x$

Savings = x-0.75x = 0.25x

Now income is increased by 20 %

So, new income = $x+\frac{20}{100}x=\frac{120}{00}x=1.2 x$

expenditure is increased by 10%

So, new expenditure = $0.75x \times \frac{10}{100} +0.75x = 0.825$

New saving = New income - New expenditure = 1.2x - 0.825x = 0.375x

So, increase in income = 0.375x-0.25x = 0.125 x

Increase percentage = $\frac{0.125x}{0.25x} \times100 = 50\%$

Hence  his saving increase in percentage is 50 %