Martha buys tennis rackets for $45 dollars. She marks them up 25% before selling them. What is the retail price of the tennis rackets?
She marks up the price by 25%, so she is selling them for 125% (100+25=125%=1.25) of the original price that she bought it for.
45x1.25
=56.25
She sells the tennis rackets for $56.25 each.