Question

The price of a radio was $20 it's on sale for $15 what is the percent of change in the price of a radio

Answer 1

Your answer is 25%  of change in the price of a radio

Answer 2

Change = $5

% change = change / original   *  100
                 =  5 / 20    *   100    
                 =   500 / 20
                 =  25%