Bihar Police Constable Model Paper 2

Given:
Rate of sugar increases by 25%
Formula used:
Total expenditure = Rate × Consumption
Calculation:
Let the initial price of sugar be Rs. 100/kg and initial consumption be 100 kg
Total expenditure = Rs. 100 × 100
⇒ Rs. 10,000
Now, New rate of sugar = Rs. 100 × (125/100)
⇒ Rs. 125
New consumption = 10000/125 kg
⇒ 80 kg
Decrease in consumption = [(100 – 80)/100] × 100%
⇒ 20%
∴ The decrease in consumption is 20%