Solve Percent Problems Using Proportions

Which of these proportional equations would you use to find the missing pieces of a percent problem, using the words "Part and Whole"?

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Which of these proportional equations would you use to find the missing pieces of a percent problem, using the words "OF and IS"?

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What is 30% of 80?

• 30
• 24
• 2.4
• 56

120 is ______% of 40

• 300
• 35
• 125
• 250

A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the student answers correctly?

• 25 problems
• 16 problems
• 18 problems
• 9 problems

A student answered 86 problems on a test correctly and received a grade of 98%. How many problems were on the test, if all the problems were worth the same number of points? (round to the nearest whole number)

• about 98 problems
• about 86 problems
• about 88 problems
• about 84 problems

Bonnie took a history test and scored 21 out of 84 correct. What percentage did she get right?

• 25%
• 75%
• 4%
• 21%

Everyone at Ethan's school wore either brown or yellow for school spirit day. 74 out of the 100 students at the school wore brown. What percentage of the students wore brown?

• 26%
• 26
• 74
• 74%

A factory made 125 packs of gum. 32% of the packs contained mint-flavored gum. How many packs of mint gum did the factory make?

• 85 packs 
• 32 packs
• 40 packs 
• 40%

What is 90% of 250?

• 245
• 225
• 255
• 244.33