## Sunday, January 16, 2011

### Karen's Final Percent Post

Percent-means out of 100. Another name for hundredths.
ex. 88% means 88 out of 100 or 88/100 or 0.88 .

4.1 Representing Percents
To represent percent, you can shade squares in a hundred grid. To represent percent greater than 100%, shade more than one hundred grid. To represent a fractional percent between 0% and 1%, shade a part of a square. To represent fraction more then 1%, shade squares from the hundred grids for the whole number. Then shade part of a square to shade the fraction part.

4.2 Fractions, Decimals,Percents
Percents can be written in fraction and a decimal.

ex. 750% to a fraction and decimal.
Decimal: 750% ÷ 100= 7.5
Fraction: 750/100

4.3 Percent of a Number
Can use mental math strategies such as halving, doubling, and dividing by ten to find the percent of some numbers.
To calculate the percent of a number, write the percent as a decimal then multiply by the number.

ex.300% of 2000: 300÷100=3
2000x3=6000

4.4 Combining Percents
Percents can be combined by adding to solve problems.
ex. 5%+6%= 11%

To calculate the increase of a number
You can add the combined 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
Percent Review Video