Problem Solving

This is an easy one, but sometimes it becomes tricky for me. Specially when the problem envolves only variables with no numbers.

Mark up can be either an amount or a percentage and usually applies to percent questions.

We usually see mark up as a % change in price of an item. For example:

"If a store buys an item for $15 and then marks it up by 20%, what is the sale price of the item?"

"If after purchasing an item for $n a store marks it up by 25% and then sells the item for $20, what's the value of n?"

try plugging in smart numbers because they usually yield nice answers and eliminate alot of the confusion rendering the once hard question pretty easy.