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1  
 
one-third: When a region is divided into three equal parts, each part is one-third  
 
of the whole. 3  

3 equal parts
1 part is shaded.
Fraction of shaded part = 1
3

1 + 1 + 1 =
3 3 3 1 → Three thirds make a whole.

Let us see a few more fractions.

Total number of number of Fraction for Fraction for
Figure
equal parts shaded parts one part shaded parts

1 3
10 3
10 10

1 4
12 4
12 12

1 4
8 4
8 8

nUmerATor And denominATor

In a fraction, the number above the horizontal line is the numerator and the number
below the horizontal line is the denominator.

Number of parts considered Numerator
Fraction = =
Total number of parts Deenominator

3  
Here, in the fraction for the shaded parts   Numerator
 ,
3
 
4  
3 is the numerator and 4 is the denominator. Horizontal 4
line
Look at the fractions for the shaded parts in these figures. Denominator

1 Numerator 5 Numerator
4 Denominator 6 Denominator

94 Mathematics 4