Finding the Whole, Part, and Percent

18 is 40% of what number?

24 is 80% of what number?

54 is 75% of what number?

12 is 48% of what number?

36 is 9% of what number?

6 is 3.2% of what number?

5 is 0.4% of what number?

42 is 120% of what number?

108 is 180% of what number?

Greg took a test.  Out of 12 questions, he answered only nine correctly.  What percent of the questions did he score correctly?

• 75%

• 50%

• 80%

• 85%