Joy is planning to purchase a sweater that costs 30$ dollars at her local department store. the sweaters are on sale for for 20% off. which steps are needed to find the sale price of the sweater in words?

Since you know the price before the sale, you know that 30$ is 100%. Then you can easily find out how much money is the discount percentage: 0.3 x 20 = 6$.
Then you just have to subtract 6 (the given percent) from 30 (the actual price) and you will get sale price of the sweater.

Answer 20 centimeters15+8=2323-3=20so the answer is 20 centimeters