" The increase from what the store pays to the selling price to make a profit" 

" A decrease in the original price of an item. " 

" Percent means out of 100 and is written with the symbol % " 

" A proportion where one ratio compares part of a quantity to the whole quantity and the other ratios is the equivalent " 

" A percentage equation is one that is used to find proportions or ratios of different numbers " 

" The difference between a measure of experiment value and an accepted or known value " 

" Percent change is how much and amount increases or decreases. " 

" Simple Interest is money paid or earned only on the principal .

I=PRT"