Thursday, September 9, 2010

Equivalent fractions

In this lesson, we're going to learn about the equivalent fraction. Equivalent fraction is like this. The whole numbers on denominator and numerator is different but it must be acquired to multiply or divide by the same number.

 For example, 1/2 = 5/10 = 25/50.
They are equal or equivalent fractions even they have the different numerators and denominators.

  Our first example is 3/7 = x/35.
The denominator 7 got timed by 5 to get 35,
so we times 5 to 3 and we have 15. Therefore is 15/35.

 Second example is 40/80 = x/8.
Now this time, we have to find the x by using denomination. 80 became 8 because it is divided by 10.
So we divide 40 by 10 and we got 4 and lastly 4/8 can be divide into 4 so our final answer is 1/2.

 Our third and last example is 19/20 = x/100.
The working out is same as the working out in e.g.1. We find the relations between 20 and 100, and is 5 and we times 5 with 19 and we have 95 therefore our answer is 95/100.


* equivalent means equal amount value, weight, meaning, etc.

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