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Wednesday, December 18, 2013

Seemeen's Percent Post


A percent is a numerator that is out of one hundred. ?/100

100 percent means everything 100/100 or 10/10
To find 100% you divide the denominator by 1.
example: If you have 40 apples and you want to find out 100% of those 40 apples you think. If I think of 100 as a fraction it looks like this: 100/100. But if you divide the denominator by 1 you get 100%now if you divide denominator of 40/40 by 1 you still have 40. That means that 100% of 40 is 100%.

50 percent means half or 1/2 or 50/100.
To find 50% you divide the denominator by 2.
example: If you have 40 apples and you want to find out 50% of those apples, you think. If I think of 50 as a fraction, it looks like this: 50/100. But if you divide the denominator by 2 you get 50% which is half, now if you divide the denominator of 40/40 by 2, you get 20. That means that 50% of 40 is 20%.

10 percent means 10/100 or 1/10.
To find 10% you divide the denominator by 10.
example: If you have 40 apples and you want to find out 10% of those apples, you think. If I think of 10 as a fraction it will look like this: 10/100. But if you divide the denominator by 10 you get 10%, now you divide the denominator of 40/40 by 10 ,you get 4. That means that 10% of 40 is 4%.

25 percent means 25/100 or 1/4.
To find 25% you divide the denominator by 4.
example: If you have 40 apples and you want to find out 25% of those apples, you think, If I think of 25 as a fraction it looks like this: 25/100. But if you divide the denominator by 4 you get 25%, now if you divide the denominator of 40/40 by 4, you get 10. That means that 25% of 40 is 10%.

1 percent means 1/100.
To find 1% you divide the denominator by 100.
example: If  you have 40 apples and you want to find out 1% of those apples, you think. If I think of 1 as a fraction it looks like this: 1/100. But if you divide the denominator by 100 you get 1%, now if you divide the denominator of 40/40 by 100, you get 0.04. That means that 1% of 40 is 0.04%.


Representing percent
180%                                                                        

                   





















0.6%


12 3/4%





Converting Percents, Fractions and Decimals

1) Convert the fraction into a percent:
               3/40

answer 1) 3÷40= 0.075 X 100= 7.5  or 7.5%
                               1                 100

2) Convert the decimal to a percent and a fraction.
                           0.0064


answer 2) 0.0064 X 100= 0.64%= 64/100000÷32/32= 2/3125

Convert the percent to a decimal and to a fraction.
                             750%

Answer 3) 750÷100= 7.5 = 7 1/2                                           
                                    1


Convert these to a fraction, percent and decimal.

26%
26 ÷ 100= 0.26- decimal 
0.26= 26/100 ÷ 2/2= 13/50- reduced fraction

7/10
÷ 10 = 0.7- decimal
0.7 x 100= 70%- fraction 

0.024 
0.024= 24/1000 ÷ 2/2= 12/500 ÷ 2/2= 6/250 ÷ 2/2= 3/125- reduced fraction
0.024 x 100= 2.4%- percent 

Solve these questions using mental math and calculator method.

20% of 60 

 

    20% ÷ 100= 0.2
0.2 x 60= 12- answer


0.1% of 40 
0.1 ÷ 100= 0.001
0.001 x 40= 0.04- answer


250% of 400 
The answer in the picture is wrong, I accidentally added an extra 0 at the end. It should say 1000.

250 ÷ 100= 2.5
2.5 x 400= 1000- answer

Explain what a sale price, discount and a total price with taxes.

A sales price is the total amount you are paying.
A discount is what you save.
A total price with taxes is when you have the sales price and you add on an extra 13% for the government.

7) 0.10 x 100= 10 
     100+ 10= 110
    0.20x 110= 22
      110+ 22= 132

There was not a 30% increase because after the first 10% increase there was a new amount of caribou. So there was a new 100%.

URL of a video to help find a percent:























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