A radio is on sale for $89. If the sale price is 20% less than the regular price, what is the regular price? Thank you! 2. Originally Posted by VAP Hello, I do not know how to set-up this proportion in order to solve it: A radio is on sale for$89. If the sale price is 20% less than the regular price, what is the regular price?
Let the regular price (which you are solving for) be P. Then the sale price is equal to 80% of P. So the equation you want to solve is: $0.8P = 89$