Percent Problems

Basic Percent Equations

100

What is 50% of 300?

Equation:

Part = % • whole

150

200

What is 15% of 80?

Equation:

Part = % • whole

12

300

40 is what percent of 160?

Equation:

Part = % • whole

25%

400

120% of 90 is what number?

Equation:

Part = % • whole

108

500

22 is 88% of what number?

Equation:

Part = % • whole

25

Percent Equations: Word Problems

100

An Olympic team won 20 medals. If 30% of the medals were gold, how many gold medals did they win?

Equation:

Part = % • whole

6

200

Each day, a bakery makes 50 loaves of wheat bread. If that amount is 20% of all the bread that they bake, how many loaves do they bake each day?

Equation:

Part = % • whole

250

300

In a survey of 300 people, 180 said they prefer vanilla ice cream to chocolate. What percent prefer vanilla ice cream?

Equation:

Part = % • whole

60%

400

A student earned a grade of 80% on a math test. If they got 16 questions correct, how many questions in total were on the test?

Equation:

Part = % • whole

20

500

In a group of 50 children, 11 can not swim. What percent of children can swim?

Equation:

Part = % • whole

78%

Percent Increase/Decrease

100

Jonathan receives money from his relatives every year on his birthday.  Last year, Jonathan received $650.  This year, he received 4% more than last year.  How much did he receive this year?

$676

200

Fairfax Auto Repair originally paid its mechanics $36 per hour. Now that there is a new owner, the mechanics make 25% less.  How much do the mechanics make per hour?

$27/hour

300

Last year, a gardening store ordered 240 potted plants.  This year, they ordered 348 potted plants.  What is the percent of increase in the number of potted plants ordered annually?

45% increase

400

Enrollment in the ski/snowboard club increased by 30% this year.  There are now 182 students in the club.  How many students were there last year?

140

500

Your Quarter 2 math grade is an 89.6  this is a 12% increase from last quarter, What was your Quarter 1 math grade?

80

Percent Change

100

Ava's new iPod holds 475 songs. Her old iPod held 380 songs. Find her percent increase.

% = change / original amount

25%

200

Marcus estimates that 230 people will attend the school play. Last year the number of people who attended the play was 300. Find the percent change. (Round to the nearest whole percent)

% = change / original amount

23%

300

Jessie's cat weights 10 pounds. Last year the cat weighed 13.75 pounds. Find the percent change. (Round your answer to the hundredths place)

% = change / original amount

27.27%

400

A student found a rock with a mass of 325g. The next day, the student measured the mass again and found the rock has a mass of 342g. Find the percent change. (Round your answer to the nearest hundredth of a percent)

% = change / original amount

5.23%

500

A student's calculation during an experiment in science class was 29.7mL. His lab partner did the calculation again and found it was 25.7mL. Find the percent of change. (Round to the nearest hundredth)

% = change / original amount

13.47%

Markup/Discount Questions

100

A store pays $56 for a bluetooth speaker. The markup is 25%. Find the price the store sells the speaker.

$70

200

Find the sale price of a $34.50 blouse at 30% off.

$24.15

300

Find the selling price of a $127.50 skateboard with a 20% markdown.

$102.00

400

What is the discounted price on a $250 bicycle on sale at 30% off?

$175

500

A TV that usually sells for $175 is now on sale for $105. What is the percent discount?

40% off