If the price of oil is increased by 30%, then by how much percent a family should reduce its consumption so… · ABC26GN2412

Subject: General Aptitude · Chapter: Percentage · Exam: R.R.B. 2005

If the price of oil is increased by 30\%, then by how much percent a family should reduce its consumption so that the expenditure would remain the same?

(a)$15 \frac{1}{23} \%$

(b)$15 \frac{3}{14} \%$

(c)$23 \frac{1}{13} \%$

(d)$76 \frac{12}{13} \%$

Answer

Answer (as printed): C

Explanation

Decrease in consumption $=\left[\frac{\mathrm{R}}{(100+\mathrm{R})} \times 100\right] \%$ $$=\left(\frac{30}{130} \times 100\right) \%=23 \frac{1}{13} \% .$$

Explanation as extracted from the printed page; notation may be imperfect.

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