Page 97 - Revised Maths Wisdom Class - 3

Fracti ons 95

One-third and Two-thirds

When an object is divided into three
equal parts, then each part is called

one-third of the whole.
1
Here, each shaded part represents or ‘one-third’ or ‘1 by 3’ or ‘1 out of 3’ and is read
3
as one by three. Also, unshaded part in each case represents two-thirds as it is two parts
of three parts (or a whole).

2
We express it as or two-thirds.
3
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One-fourth and three-fourths

When an object is divided into four
equal parts, then each part is called
one-fourth (or quarter) of the whole.

1
In the above fi gures each shaded part represents one-fourth or .
4
It is read as 'one by four' or '1 out of 4'.

The unshaded part is 3 parts out of 4 equal parts and hence it is represented as 3 or
4
three fourths of the whole.

Thus, to write fractions, we write the selected part on the top as numerator and total
parts (or whole) as the denominator.

Numerator 1 3 Numerator
Denominator 2 4 Denominator

Let's Practise

Try to write the shaded and unshaded part of the following fractions. One is done for
you.

1
5
Shaded part _____ Shaded part _____ Shaded part _____
Unshaded part _____ Unshaded part _____ Unshaded part _____