## Sunday, January 16, 2011

### Final Percent Post

Chapter 4: Understanding Percent

1. Summarize

Percent: Means out of 100, another name for hundredths
Fractional Percent: A percent that includes a portion of a percent, such as 1/2%, 0.42%, 7 3/8%, 125 3/4%, and 4.5%.

4.1 Representing percents
-represent percent, shade squares on hundred grids, one complete shaded grid is 100%
-represent percent greater than 100%, shade more than one grid
-represent fractional percent between 0% and 1%, shade part of one square
-represent fractional percent greater than 1%, shade squares from hundred grid to show whole number and part of one square from grid to show fraction.
Example:

4.2 Fractions, Decimal, and Percents
-fractions, decimals, and percents can be used to represent number in various situations
-percents ca be written as fraction and decimals
Example:
Decimal=Percent=Fraction
0.0064=0.64%=8/125

4.3 Percent of a Number
-can use mental math strategies such as halving, doubling, and dividing by 10 to find the percents of some number
-to calculate the percent of a number, write percent as decimal and then multiply by the number
Example:
12 1/2 of 50 = 0.125x50 = 6.25

4.4 Combining Percents
-can be combined by adding to solve problems
Example:5% + 7%=12%
-to calculate increase in number
-can add the combined percent amount to original number
Example:12% of 100 = 0.12x100=12
100+12=112
-cam multiply original number by a single percent greater than 100
Example:112% of 100 = 1.12x100
= 112
-percents of percents can be used to determine amounts that result from consecutive percent increases or decreases

2. Percent Review Video

*Sorry it's over 5 minutes*