Write a real-world problem involving a percent that can be solved by using the proportion 3/b = 60/100. Then solve the proportion.

Dax goes to the store to buy milk. There is a sale for milk, and it now costs 3 dollars since it was 60% off. What was the original price of the milk?

3 - 60

x - 100

Cross multiply

300=60x

5=x

The milk original cost 5 dollars.