Convert between fractions, decimals, and percents.
Calculate tax, tip, and discount. (1 step or multi-step)
Find the number/percent
Calculate percent change or percent error
Calculate simple interest.
100

Fractions → Decimals 

17/25

0.68

100

Fill in the blank:

Sales tax and tip are ____ to the original price and Discounts are ____ from the original price.

added and subtracted

100

What is 32% of 300?

96

100

From 12 ft to 23 ft

92% increase

100

Ben deposited $6,500 in a simple interest account that pays 2.8% interest annually. If Ben leaves the money in the account for 12 years, how much interest will he earn?

$2184

200

Decimals → Percents

0.385

38.5%

200

An item is regularly priced at $540.  The sales tax rate is 6%  How much money is the tax?

$32.40

200

22 is 44% of what number?

50

200

From 188 m to 42 m

78% decrease

200

Hector took out a small loan of $900 for 18 months. The simple interest rate on the loan was 10.5%. How much will he pay in interest on the loan?

$141.75

300

Percents  →  Decimals 

4.75%

0.0475

300

How much would you spend at a restaurant if your bill is $45.60 and you leave an 18% tip?

$53.81

300

What percent of 50 is 4?

8%

300

Philip went surfing twice this week. Yesterday, he spent 5.4 hours out riding waves. Today he surfed for 3 hours. Comparing yesterday to today, what is the percent of decrease in time that Philip spent surfing?

Round your answer to the nearest tenth of a percent.

44.4%

300

Steph took out a simple interest loan that charges 8.5% interest annually. If her original loan amount was for $30,000 and she is paying off the loan over 20 years, how much will she pay altogether?

$81,000

400

Fractions → Percents

5/16

31.25%

400

An item is regularly priced at $25. It is on sale for 30% off the regular price.

With the discount, what is the sale price of the item?

$17.50

400

40% of what number is 8?

20

400

Rebecca's dad helped her order some picture books from an online store. The shipping estimate said the package would come in 6 days. However, the package actually arrived in 8 days. What is the percent error for the shipping estimate?

25%

400

Todd takes out a student loan for $25,000. The annual simple interest rate on the loan is 7.75%. How much will he owe, including interest, after 5 years. 

What is $34,687.50
500

Percents → Decimals → Fractions  

250%

2.5 & 2 1/2 (250/100)

500

The Richards family bought some new camping gear at REI that totaled $318.50. If they receive a 30% discount and sales tax is 7.5%, what is their total bill?

$239.67

500

You have paid your car loan down to $8750, which is 43% of the original loan amount. What was the original loan amount?

$20,348.84

500

Paula was buying candy from a candy dispenser. She inserted a quarter and expected to get 14 pieces of candy. Only 10 pieces of candy actually came out of the dispenser. What is the percent error for the number of candy pieces Paula expected to get?

40%

500

After 3 years, $40,000 deposited in a savings account with simple interest had earned $14,400 in interest. What was the interest rate?
 

12%.

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