Question

If the price of a book is first increased by 25%

Answer 1

Answer:

Let the original price be Rs. 100. New final price = 120 % of (75 % of Rs. 100) = Rs. [(120/100) * (75/100) * 100] = Rs. 90. If we are considering 100 as the original price then 25% decrease in value would be 75 so why are we and then 20% increase would be 80.

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Let the price of the book is 100%.

First time the price of the book is decreasing by 25%.

When the price of the book decreases by 25%, it remains (100–25)= 75% of original.

New price of book = 75%.

And after that the price of book is increasing by 20%.

when the price of the book increases by 20%, it becomes 120% of original or 75*120/100= 90%

So overall there will be a decrease of 10%.