Fraction's

Fractions of a quantity

How do we find of 20?

Method 1 is to find of 20, then multiply by 3.

of 20 is .

We need of 20, so we multiply 4 by 3.

of .

Method 2 is to multiply by 20.

 

 

 

A fraction can be written in different ways and still mean the same thing. These are called equivalent fractions. Look at the shaded areas in this rectangle.

So .

You can produce lots of equivalent fractions by multiplying or dividing the top and bottom by the same number.

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If you are asked to fill in a missing number, remember that the top and bottom must be multiplied or divided by the same number.