Solving Percent Problems using Proportions

What number is 120% of 40?

22% of 70 is what number?

12% of what number is 18?

How many skateboards are 80% of 50 Skateboards?

21 is what percent of 75

2.6 is 40% of what number?

19 smartphones is what percent of 500 smartphones?

1.2% of 40 is how much money?