Finding Percent
Proportions
Percent Equation
Percent Change & Error
Markup & Markdown (taxes)
Simple Interest
100

Find 10% of 80.

8

100

18 is what percent of 60?  

30%

100

Solve: Part = 35% * 200.

70

100

A price increases from $40 to $50. Find the percent increase.

25% increase

100

A $50 shirt is discounted 20%. What is the discount amount?

$10


100

What is the formula for simple interest? (include time)

I=R*P*T

200

Find 25% of 120.

30

200

12 is 15% of what number?

80

200

Solve: 40% * whole = 32.

80

200

A shirt decreases from $80 to $60. Find the percent decrease.

25% decrease

200

A $75 item has 8% sales tax. What is the total cost?

$81

200

Find the simple interest on $500 at 4% per year for 2 years.

$40

300

What is 15% of 240?

36

300

A school sold 84 tickets, which is 35% of its goal. What is the ticket goal?

240

300

A student saved $54, which is 45% of their goal. Write and solve a percent equation.

45% * Whole=54
Whole= 120

300

The estimated attendance was 100, but actual attendance was 120. Find the percent error. (round up to the nearest whole percent)

About 17%

300

A store buys a backpack for $40 and marks it up 35%. What is the selling price?

$54

300

Find the total balance on $800 invested at 5% simple interest for 3 years.

$920

400

A school has 360 students. If 35% ride the bus, how many students ride the bus?

126

400

A student answered 42 questions correctly, which was 87.5% of the test. How many questions were on the test?

48

400

A fundraiser has collected $156, which is 65% of its goal. How much more money is needed?

$84 more; goal = $240

400

A bike increases from $240 to $294. Find the percent increase.

22.5%

400

A $120 jacket is discounted 25%, then taxed 10%. What is the final price?

$99

400

An account earns $90 interest on $600 in 3 years. What is the annual interest rate?

5%

500

A jacket costs $84. A customer pays 62.5% of the price. How much do they pay?

$52.50

500

A student answered 81 questions correctly, which was 60% of the test. How many questions were on the test?

135

500

A fundraiser has collected $3,307.5, which is 63% of its goal. How much more money is needed?

$5,250

500

A student estimates a distance of 75 miles, but the actual distance is 60 miles. Find the percent error.

25%

500

A video game is on sale for $68 after a 15% discount. What was the original price?

$80

500

An investment of $1,200 earns $216 in simple interest at 6% annually. How many years was it invested?

3 years

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