My answer is 32.5%.
original price = 100
price, after 25% decrease = 75
price, after 10% during the sale = 75-10% of 75 = 67.5
the amount of price to be increased = 100-67.5 = 32.5
approx % to be increased to get the original price = 32.5/67.5 = 48%.
I think this last line approx % to be increased to get the original price = 32.5/67.5 = 48%
is not required since the question is what percent would the price now have to be increased in order to restore the price of the article to its original amount
which is 100.
We have taken the original price as 100 so we don't need to go further....the answer 32.5 is already a percent value.
Answer is A.