Sunday, January 16, 2011

Cameron's Final Percent Post



A percent means out of 100, also another name for hundredths and can be expressed as decimals or fractions.

Representing percents

Shade squares on a grid of 100 squares called a hundred grid to represent a percent. A completely shaded grid represents 100%. If you shade more than one grid, that represents a percent greater than 100%. To represent a fractional percent between 0% and 1%, you have to shade part of one square. Also, to represent a fractional percent greater than 1% you have to shade squares from the hundred grid to show the whole number, then shade part of a square from the grid to show the fraction.











Fractions, Decimals, Percents

Percents can also be represented as a decimal or a fraction.
Eg. 80% = 0.8 = 4/5


Percent of a Number

You can use mental math strategies such as doubling, halving, and dividing by 10 to find the percents of some numbers. Write the percent as a decimal and then multiply by the number to calculate the percent of a number.
Eg. 14 1/2% of 60 = 0.145x60 = 8.7


Combining Percents

Adding percents can solve problems, for example; 5% + 6% = 11%.

To calculate the increase in a number, add the combined percents to the original number.
Eg. 15% of 100 = 0.15x100=15, 100+15=115
Or multiply the original number by a single percent greater than 100.
Eg. 115% of 100 = 1.15x100 = 115

Percents of percents can be used to determine amounts that result from
consecutive percent increases or decreases.

Percent review video:


Here's a video http://www.youtube.com/watch?v=7JYaE0ogtMI to help you learn more about percents.

6 comments:

  1. Cameron, I like how you added colors to the main headings. I also like how you added a picture on how we solve it, and you added a link to a video we can watch if we are struggling, it helped me understand it better. Thanks Cameron, and good job (:

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  2. Good job, Cameron! I liked how you had complete defintions for each part of the chapter. Next time, add in a link to your scribe post. Keep it up!

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  3. Good Job Cameron! I liked how you added colors, picture and a video unto your scribe. No errors for now! Keep up the good work!

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  4. Good job Cameron. I liked how you used a picture for a diagram. But you could have added a link. Be sure to do that next time.

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  5. GOOD JOB CAMERON! I liked how you added a picture, right amount of colors, and videos. Next time, try to take a picture of your own work instead of making one in paint. Keep up the good work!

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