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Percent of a Number Math Wheel

8/11/2017

7 Comments

 
Teaching Percent of  Number in Middle School Math
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Blog post about teaching percent of a number, with a free percent of a number Math Wheel.
What method do you use for teaching percent of a number concepts in middle school math?

When I teach students to find the percent of a number (or the part or whole), I introduce two different ways to find the missing number - using proportions and using equations. Since different math students often prefer different methods, I teach both, have students practice both, and then let them choose the method they like better. I've given an example of each method below.

The Percent of a Number Wheel shown here includes both methods. Each section of the wheel includes an equation and two examples, with room to solve using both methods. There's also a little room on the wheel (or around it) to add extra notes or your own examples, if you'd like. Around the wheel are a few practice problems that can be completed together or individually.

Method 1: Proportion
1) Substitute the given values into the %/100 = IS/OF proportion. Use a variable for the missing number.
2) Solve the proportion to find the missing value.

​Example: What is 15% of 70?
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Percent of a number math wheelClick to download free percent of a number math wheel.
Method 2: Equation
1) When given the percent, change it to a decimal.
2) Substitute the given values into the equation. Use a variable for the missing number.
3) Solve the equation.
* If finding the percent, be sure the  answer is in percent form (multiply the decimal answer by 100).
Example: What is 15% of 70?                    
                    part = % ∙ whole

                         x = 0.15 ∙ 70  
                         x = 10.5  

When we work with the equations, I do manipulate the equations to show students how they are all versions of the same basic equation.
For example, if we start with part = % ∙ whole and we're looking for the whole (say the part is 35 and the percent is 25), we end up with
35 = 0.25 ∙ x. From solving algebraic equations, students know that to
find x, both sides will be divided by 0.25, which gives them
         x = 35/0.25
(whole = part/%)

If you decide to use the wheel, I hope you and your students like it!

If you're looking for more percent of a number resources, check out the Percent of  a Number Center Resources on TPT.

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7 Comments
Denise Autin
10/17/2017 04:06:08 am

Looking forward to showing the students your wheel!

Reply
Ellie
1/18/2018 01:57:36 pm

I hope they liked it!

Reply
Heather
1/7/2018 05:20:05 pm

Thank you! I have a review lesson in a couple days and this will be used!

Reply
Ellie
1/14/2018 05:33:04 am

I hope they liked it and that it was helpful:-)

Reply
Laura Streich
1/18/2018 08:16:48 am

This is so wonderful and great! I love it! I did find what I believe to be one mistake. On the bottom left corner it asks 7% of 75 is what number? When converting 7% to a decimal, it shows .7 instead of .07 making the answer 52.5 instead of 5.25. Thank you again for this wonderful addition to our interactive math notebooks!

Reply
Ellie
1/18/2018 01:56:47 pm

Thank you so much for letting me know about the mistake! Talk about checking your answers and seeing if they're reasonable, lol - I missed that one!

I'm glad you liked it:-)

Reply
Rebecca link
4/21/2019 09:14:13 pm

Lovely blog you have here Ellie!

Reply



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    Hey there! I'm Ellie - here to share math fun, best practices, and engaging, challenging, easy-prep activities ideas!
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