-can be expressed as fraction (n/100) and as a decimal (o.1)

**4.1 Representing Percents:**

- One completely shaded grid represents 100%

- If you need to shade more than 100, you can use

4.2 Fractions,Decimals, and Percents

- Fractions, decimals, and percents can be used to show numbers in different situations.

-Percents can be written as fractions and as decimals.

EXAMPLE:

4.3 Percent of a Number

- We can use mental math techniques such as halving, doubling, and dividing by 10 to find the percents of some numbers.

- To calculate the percent of a number, write the percent as a decimal and then multiply by the number.

EXAMPLE:

12 1/2 % of 50 = 0.275 x 50

= 13.75

4.4 Combining Percents

- Percents can be put together by adding to solve problems.

eg. 5% + 7% = 12% ( We always use 12% as tax in our case)

- You can add the combined percent amount to the original number.

eg. 15 % of 100 = 0.15 x 100 = 15

100 + 15 = 115

- You can multiply the original number by a single percent greater than 100.

eg. 155% of 100 = 1.15 x 100

= 115

- Percents of percents can be used to figure out amounts that result from consecutive percent increases or decreases

PERCENT REVIEW VIDEO:

**another**grid.- To show a fractional percent between 0% and 1%, shade part of one square

- To represent a fractional percent more than 1%, shade squares from a hundred grid to show the whole number and part of one square from the grid to show the fraction.

EXAMPLE:

- To represent a fractional percent more than 1%, shade squares from a hundred grid to show the whole number and part of one square from the grid to show the fraction.

EXAMPLE:

4.2 Fractions,Decimals, and Percents

- Fractions, decimals, and percents can be used to show numbers in different situations.

-Percents can be written as fractions and as decimals.

EXAMPLE:

4.3 Percent of a Number

- We can use mental math techniques such as halving, doubling, and dividing by 10 to find the percents of some numbers.

- To calculate the percent of a number, write the percent as a decimal and then multiply by the number.

EXAMPLE:

12 1/2 % of 50 = 0.275 x 50

= 13.75

4.4 Combining Percents

- Percents can be put together by adding to solve problems.

eg. 5% + 7% = 12% ( We always use 12% as tax in our case)

- You can add the combined percent amount to the original number.

eg. 15 % of 100 = 0.15 x 100 = 15

100 + 15 = 115

- You can multiply the original number by a single percent greater than 100.

eg. 155% of 100 = 1.15 x 100

= 115

- Percents of percents can be used to figure out amounts that result from consecutive percent increases or decreases

PERCENT REVIEW VIDEO:

My scribe post: http://spmath81710.blogspot.com/2010/11/pythagoras-textbook-questions-and.html

(I don't have the percent post because I blogged early when our percent chapter started, so I used the last blog I made which is Pythagoras)

Here are some links to help you:

http://www.mathgoodies.com/lessons/vol4/meaning_percent.html

http://www.mathsisfun.com/decimal-fraction-percentage.html

http://www.mathsisfun.com/percentage.html

Here are some math gaming sites you may want to check out:

http://www.mathsisfun.com/games/index.html

http://www.mathplayground.com/games.html

http://www.mathgoodies.com/lessons/vol4/challenge_vol4.html

Here are some percent video you may want to watch:

http://www.youtube.com/watch?v=2rr-IXInEVc

Good job Bennette. I liked everything about it. From the way you added colours, pictures, video and A LOT of links.Great job Bennette! Keep it up!:)

ReplyDeleteGreat job, Bennette! I absolutely love how you put more effort than what Mr. Harbeck told us to do. No mistakes, keep it up!

ReplyDeleteMagnificent Job Bennette! Your blog is so perfect. No errors and all that, you really made a lot of effort making this post. Keep it UP!

ReplyDelete