The cost of an item is reduced by 50%. What percentage increase is required to return to its original price?

Question

This question is about percentage increase and decrease

Answer 1

If the PRICE of an item is reduced from p to 50% of p then its new PRICE is 0.5p.

To restore it to its original PRICE,you would have to DOUBLE that; DOUBLING means increasing by itself; this increase would be 100% of the most recent price.