10.1 - Percent

Multiple Choice

A percent is a ration of some number to ___

• itself

• 1

• 1000

• 100

Fill in the Blank

Change the number to a percent

$$\frac{4}{5}$$  

Multiple Choice

To change a decimal number to a percent, multiply the decimal number by ____ and add a percent sign.

• itself

• 0.01

• 100

• 1000

Fill in the Blank

Express the given decimal as a percent (Do not round)

0.9305

Multiple Choice

To change a percent to a decimal number, remove the percent sign and ____ by 100

• add

• subtract

• multiply

• divide

Fill in the Blank

The population of a country has been decreasing for several decades. In 1990, the population was about 134 million people. In 2010, the population was about 127 million people. Determine the percent decrease in the country's population during this time period.

The country's population decreased by about ___% during this time period.

(Round to one decimal place as needed)

Fill in the Blank

Use the circle graph to answer the question.

A library classifies its DVDs into one of the categories shown.

The library owns 1872 DVDs.

Determine the number of comedy DVDs.

(Round to the nearest whole number as needed)

​Percent Of A Number

​Ex. 1: What percent of 96 is 12?

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Step 1: Translate ​the words of the problem into an equation. Some common words or phrases and the corresponding symbols to use in the equation are shown below.

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Step 2: Solve​

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Fill in the Blank

What percent of 68 is 34?

​Percent Of A Number

​Ex. 2: In a mathematics class, 33 students received an A on the third test, which is 150% of the students who received an A on the second test. How many students received an A on the second test?

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Step 1: Restate the problem - What percent of what number is ​___

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150% of ​what number is 33?

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Step 2: Solve​

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Fill in the Blank

In a mathematics class, 42 students received an A on the third test, which is 175% of the students who received an A on the second test. How many students received an A on the second test?

On the second test, _____ students received an A.