Robert used to spend 85% of his income.When his income increased by 36% his expenses also increased by 40% of his earlier expenses. How much percentage of his earning he saves now?
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Solution :-
Robert's income = A
Amount spent = expenditures = 85/100 × A
Amount saved = A - 85/100 × A
= > 15/100 × A
or 15% of income.
New income after the increase: A + 36% × A
=> 136/100 × A
New expenditure = (85/100 × A) + 40/100 × (85/100 × A)
=> 85/100 × A × 140/100
= > 119/100 × A
New savings now = income - expenditure
= 136/100 × A - 119/100 × A
= 17/100 × A
So Robert's savings now are = 17% of his income.
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@GauravSaxena01
Robert's income = A
Amount spent = expenditures = 85/100 × A
Amount saved = A - 85/100 × A
= > 15/100 × A
or 15% of income.
New income after the increase: A + 36% × A
=> 136/100 × A
New expenditure = (85/100 × A) + 40/100 × (85/100 × A)
=> 85/100 × A × 140/100
= > 119/100 × A
New savings now = income - expenditure
= 136/100 × A - 119/100 × A
= 17/100 × A
So Robert's savings now are = 17% of his income.
===================
@GauravSaxena01
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