## Sunday, January 16, 2011

### Paulo's Percent Review Video

A percent means out of 100 and it also another name for hundreths
Ex. 75% means 75/100, 75 out of 100, or 0.75

4.1 Representing Percents
Representing percents means showing a percent as a picture in a hundred grid
Ex. 25% on a hundred grid, 25 squares of the grid would be shaded so its 25%

4.2 Fractions, Decimals, and Percents.
- Fractions, Decimals, and Percents can be used to represent numbers in various situations
- Percents can be written as a fraction and as decimal
Ex. 1/2% = 50%, 0.5% = 0.5/1000 = 0.005, 150% = 150/100 = 1.5, 42 3/4 = 42.75% = 42.75/100 = 0.4275

4.3 Percent of a number
- You can use mental math strategies such as halving, doubling, and dividing by ten to find the percent of same numbers
- To calculate the percent of a number, write the percent as a decimal then multiply by the numbers
Ex. 12 1/2% of 50, 0.125 x 50 = 6.25 (12 1/2% = 12.5% = 0.125)

4.4 Combining Percents
- Percent can be combined by adding to solve problems ; 5% + 7% = 12%
To calculate the increase in a number you can add the combined percent amount to the original number.
Ex. 12% of 100 = 0.12 x 100 = 12, 100 + 12 = 112
- You can multiply the original number by a single percent greater than 100
Ex. 112% of 100 = 1.12 x 100 = 112
- Percents of percents can be used to determine amounts that result from consecutive percent increases or decrease

Understanding Percents

* percents are cool and paulo is cool too :)

#### 2 comments:

1. Great post Paulo, I liked how you showwed your work and your written post was neat too. Next time you should highlight words instead of just plain Bolds .

2. Great job Paulo. Your post was really neat and organized. Your video was also good and you showed your work well. Next time add some color to your post on the important words to make it stand out. Other than that, great job