A man spends 60% of his income.his income increases 40% and due to this ,he increases his expenditure also by 40%.find the percentage increase in his savings.
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suppose man income is 100
he spaind 60 % = 60
income increase by 40%=140
expenditure increase by 40%=60×40%
=84
new saving =140-84
=56
0ld saving=100-60
=40
% of increase saving=40+40×X%=56
40+2/5X=56
2/5X=56-40
X=16×5/2
X=40
percentage increase in his saving=40%
he spaind 60 % = 60
income increase by 40%=140
expenditure increase by 40%=60×40%
=84
new saving =140-84
=56
0ld saving=100-60
=40
% of increase saving=40+40×X%=56
40+2/5X=56
2/5X=56-40
X=16×5/2
X=40
percentage increase in his saving=40%
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