Sunday, January 16, 2011

Marie's Final Percent Post

Percent means out of 100, and can be expressed as decimals or fractions. Also, it is another name for hundredths.

4.1 Representing Percents:
One fully shaded in grid equals to 100%. If you want to show a percent larger than 100%, shade in more than one grid. To represent a percent less than 1%, colour in part of one square. Shade in squares to represent the whole number, and shade in part of a square to show the fraction.

4.2 Fractions, Decimals, & Percents:
Percents can be written as decimals and fractions.

For example,
25% = 0.25 = 25/100 or 1/4

4.3 Percent of a number:
To find the percents of some numbers, you can use mental math strategies such as halving, doubling, or dividing by ten.
Write the percent as a decimal then multiply by the number to calculate the percent.

For example,
350% of 10 = 3.50 x 10 = 35

4.4 Combining Percents:
Percents can be combined by adding to solve percents.
Eg. 5% + 7% = 12%

To calculate the increase in a number you can:
Add combined percent to the original number.
12% of 100 = 0.12 × 100 = 12
100 + 12 = 11
Multiply the original number by a single percent greater than 100.
112% of 100 = 1.12 × 100 = 112

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

My Percent Review Video

For this unit, I did one percent scribe post.

Here is a link on percentages.

1 comment:

  1. GREAT JOB MARIE! Your scribe is very neat and well organized. You used colors to make each heading stand-out. Also, you added in examples, a link, and I really like your video. Keep up the good work