Fractions to Percent
Decimals to Percent
Percent Increase/Decrease
Simple Interest
Percent of Amounts
100

Convert 12/100 to a percentage. 

12%

100

Convert 0.82 to a percentage. 

82%

100

Increase 72 by 10%. 

79.2

100

Luis invests $300.  He earns 5% simple interest over the course of one year.  How much is his investment worth after this year?

$315

100

30% of a number is 150.  Work out the number.  

500

200

Convert 6/50 to a percentage

12%

200

Convert 0.07 to a percentage. 

7%

200

Decrease 109 by 18%. 

95.92

200

With simple interest, you earn the _______ amount of interest every year.  

SAME

200

72% of a number is 234.  What was the original number?

325

300

Convert 21/20 to a percentage. 

105%

300

Convert 8.97 to a percentage. 

897%

300

A shirt is on sale for 30% off.  It's original price was $28.7.  Find the sale price.  

$20.09

300
Carlota invests $550, and has a simple interest rate of 7%.  How much is her investment worth after 6 years?  Round to 2 decimal places. 

$825.40

300

A number is decreased by 45%, and the new number is 82.5.  What was the original number?  

150

400

Convert 59.5/90 to a percentage. 

55%

400

Convert 5.3 to a percentage. 

530%

400

Lauren picks the number 72.  She decreases it by 50%, and then increases it by 50%.  What number does she end up with?

54

400

Xavier invests $600 into an account with a 5% simple interest rate.  Borja invests $500 into an account with a 6% interest rate.  In 10 years, who will have more money, and by how much?

Xavier will have $81.92 more dollars. 

400

A TV show had 4500 viewers in February.  This was a 20% decrease from January.  How many viewers did they have in January?  

5625

500

Convert 42/150 to a percentage. 

28%

500

Convert 0.009 to a percentage.

0.9%

500

At a 22% off sale, Jack buys a shirt for $49.14.  What was the original price of the shirt?

$63

500

Devyn gets $189 dollars for Christmas.  They invest 30% of it into an account with a 4% simple interest rate.  After 3 years, how much money is their account worth?  Round to 2 decimal places. 

$63.78

500

A magazine had 2000 readers in 2016.  This was a 100% increase from 2015.  How many readers were there in 2015?

1000 readers

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