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Tuesday, December 17, 2013

Rafael's Percent Post

Percents mean:                       Rafael Nieves    Room 8-14       Math


1. Percents mean - Per (out of a) cent (hundred)

Why 100%? Because it is not only a friendly number, it is also just about right. Not to big, not to small, about in the middle.

What about 205% - 2 wholes
                              - equivalent fraction --> 205/100
                              - improper or top heavy

Means....(by T-Charts)

1% means - 1% of 100%
                 - 1/100

10% means - 10% of 100
                   - 100/10 or 40/10
                   - Divides by 10's

25% means - 25% of 100
                   - 100/4 or 40/4
                   - Half of 50
                   - Divides by 4's

50% means - 50% of 100
                   - 100/2 or 40/2
                   - Half
                   - Divides by 2's

100% means - 100% of 100%
                     - all, whole, everything, 1/100, /100

Symbol presents...

- Line in between the two zero's is the number one. It is also the divider for fractions.
- The two zero's represents the ends of the number 100

2. Representing Percents



  • 180%


  • .6%

  • 12 3/8%



3. Representing and Converting














Mental Math
















Calculator

1. 60/100 = 0.6 x 20 = 12

2. 40/100 = 0.4 x 0.1 = 0.004

3. 400/100 = 4 x 250 = 1000

4. Combining Percents

Discounts is what you save.
Sale Price is what you pay.

Sale price Solution, Regular- Discounts= Sale Price

Taxes

Ex. GST 5%
       PST 6%
               ----
              11%

100 + 11 = 111/100 = 1.11 then multiply to the money.

EXAMPLE:







     






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