The tax imposed on an article is decreased by 10% and its consumption increases

Question

The tax imposed on an article is decreased by 10% and its consumption increases by 10%. Find the percentage change in revenue from it.

Options:

A . 2% decrease

B . 11% increase

C . 1% decrease

D . 10% increase

Answer: Option C
Answer: (c)
Using Rule 3,
If an amount is increased by a% and then it is reduced by a% again, then the percentage change will be a decrease of $a^2/100$%

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