Percentages Pt 1

Percentages Pt 1

By the end of this unit you should be able to say: I can...

• Determine the percent of a number as a rate per 100.

• Determine the whole, given the part and the percent.

• Determine the part, given the whole and the percent.

• Solve word problems involving percents.

Standards

• CCSS.MATH.6.RP.A.3.C

  Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole, given a part and the percent.

Multiple Choice

Simplify this expression in it's simplest form:

 $\frac{3}{8}+\frac{9}{10}$  

•  $\frac{12}{18}$  

•  $\frac{2}{3}$  

•  $\frac{60}{40}$  

•  $1\frac{1}{2}$  

Learn about Percents

Suppose you took a test and found out that you answered 90% of the questions correctly. What does that mean? Assuming there were 50 questions on the test, how many questions did you answer correctly?

Learn about percents

Questions like these arise frequently in everyday situations. You will encounter percents when you shop, read the newspaper, and more. Therefore, it’s important to understand what percents are telling you. 

Let's see if you can solve that problem

Group work time!

What does it mean?

• Percent is a two part word

• Per means every

• Cent means one hundred

• So percent means every one hundred.

What does it mean part 2

• A rate is a ratio that describes the relationship between two amounts

• A percent is a rate that relates to 100.

• So 25% means 25 out of 100 or

   $\frac{25}{100}$  5% means  $\frac{5}{100}$  

Open Ended

What is a percent?

Models

A 10 by 10 grid is a common help in modeling percents.

Poll

How are you feeling about percentages?

• Perfect

• Pretty Good

• Kinda Cloudy

• Not Good

Don't forget iReady

Do 10 Minutes Today!

Open Ended

Any questions?