The price of sugar per kg increased from ₹ 16 to ₹ 20. The percentage reduction in the use of sugar so that the expenditure does not increase, should be
(a)15\%
(b)20\%
(c)25\%
(d)40\%
Answer
Answer (as printed): B
Explanation
Let original consumption = 100 kg and new consumption $=x \mathrm{kg}$. So, $100 \times 16=x \times 20 \Leftrightarrow x=80$. $$\therefore \quad \text { Reduction in consumption }=20 \% \text {. }$$