Thursday, January 13, 2011

Emily's Final Percent Post

4.1 Representing Percents
To represent a percent you can shade in a hundred grid. If the percent is greater than 100% you would use more than one hundred grid. If the fraction is less than 1% you would shade in part of a hundredth and show it in an enlarged image. If the fraction is between 1% and 100% you would shade in part of the hundred grid.

4.2 Fractions, Decimals, and Percents
Fractions, decimal, and percents are all ways to represent numbers in many situations. A percent can also be written as a fraction and a decimal.

For example if you scored 8/10 on a test that would be 0.8 or 80%.

4.3 Percent of a Number
To find the percent of a number you can use mental math strategies (ex.halving, doubling, and dividing by 10). When you find the percent of a number you can write it as a decimal than multiply it by the number. For example, 10% of 50= 0.10x50 0.10x50= 0.5 (50%).

4.4 Combining Percents
You can combine percents using adding to solve problems. (7%+5%=12%)

To find out the increase in a number:
You add the combined percent to the original number. (12% of 100=0.12x100=12) (100+12=112)

You can multiply the original number by one percent greater than 100.

(112% of 100=1.12x100) (1.12x100=112)

Here is a LINK for a site on percents.

Here is a LINK for my percent scribe post.

Here is my Percent video:

Here is a video on Percent of a Number:

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