Percentage Practice Test 4 with solutions

Question : 20 of 40

Marks: +1, -0

Electric tax is increased by 20% and its consumption is decreased by 20%. The change in the expenditure is:

Solution:

Let initially electric tax is Rs. 100 and consumption = 100 units
Decrease in consumption = 100 × 100 – 120 × 80 = Rs. 400
Hence, decrease percentage

={400×100}/{100×100}=4%

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