Yearbook sales this year increased 120% over last years yearbook sales. If 465 yearbooks were sold last year, how many were sold this year?

First turn the percent into a decimal. It would be 1.20.
Multiply 465 and 1.20.
465 x 1.20=558
Then add 465 and 588 to get the final amount.
465+558=1023
There were 1,023 yearbooks sold this year.