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Question : If the price of onion increases from INR 60 per kg to INR 75 per kg, then by what percentage should a household decrease the consumption of onion so that expenditure remains the same?

Option 1: 40%

Option 2: 25%

Option 3: 20%

Option 4: 30%


Team Careers360 18th Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 20%


Solution : Let the household consume $a$ kgs of onion earlier and $b$ kgs of onion later.
⇒ The price paid by the household earlier = $60a$
⇒ The price paid by the household now = $75b$
Since both prices should be the same,
⇒ $ 60a = 75b$
⇒ $b = \frac{4a}{5}$
$\therefore$ Required percentage = $[\frac{(a-\frac{4a}{5})}{a}] × 100=\frac{100}{5}= 20\%$
Hence, the correct answer is 20%.

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