In subtraction of fractions having the same denominator, we just need to subtract the numerators of the fractions.
Follow the steps of subtraction of like fractions:
We can subtract in a similar way. 7/8 of the class are boys.
3/8 of the class are girls. By how much fraction are the boys more?
Boys 7/8
Girls 3/8
7/8  3/8
= (7  3)/8
= 4/8
The difference is 4/8 or 1/2
We can also reduce the fraction to the lowest term.
4/8 ÷ 4/4
= 1/2
Examples of subtracting fractions with the same denominator:
1. Subtract 3/8 from 7/8
Solution:
7/8 – 3/8
= (7  3)/8
= 1/2
2. Subtract 5/6 from 11/6
Solution:
11/6 – 5/6
= (11  5)/6
= 6/6
= 1/1
= 1
3. Subtract 7/9 from 11/9
Solution:
11/9 – 7/9
= (11  7)/9
= 4/9
4. Subtract 4/6 from 16/6
Solution:
16/6 – 4/6
= (16  4)/6
= 2/1
= 2
5. Subtract 2/4 from 17/4
Solution:
17/4 – 2/4
= (17  2)/4
= 15/4
Related Concept
● Representation of a Fraction
● Properties of Equivalent Fractions
● Comparison of Like Fractions
● Comparison of Fractions having the same Numerator
● Conversion of Fractions into Fractions having Same Denominator
● Conversion of a Fraction into its Smallest and Simplest Form
● Addition of Fractions having the Same Denominator
● Subtraction of Fractions having the Same Denominator
● Addition and Subtraction of Fractions on the Fraction Number Line
4th Grade Math Activities
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