QOTD - Quantitative Aptitude - Percentages
2019-09-16 | Team PendulumEdu
If the income of a person is increased by 20% and his expenditure is increased by 15%, then what will be the percentage change in his savings if he was saving 40% of his earlier income?
Income = expenditure + savings
Let the earlier income be x
According to the question, a person was saving 40 % of his earlier income
So, earlier he was having an expenditure of 0.6x and saving of 0.4x
Old expenditure = 0.6x
Old Saving = 0.4x
The income of the person is increased by 20%
So, new income = x + 20% of x = 1.2 x …. (1)
From equation (1) and (2)
New saving = New income – New expenditure
= 1.2 x – 0.69 x
= 0.51 x
Hence, (B) is the correct answer.
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