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Grade-4
Subtracting Fractions With Unlike Denominators
Practice Preview
Subtract and write the simplified fraction :
3
8
-
1
6
Explanation
Remember, we cannot subtract fractions until the denominators are same. So, we have to find the least common denominator.
Least Common Denominator (LCD) of 8 and 6 is 24.
Now, we have to make sure both fractions have the same new denominator 24.
You can write fraction
3
8
as
3x3
8x3
=
9
24
You can write fraction
1
6
as
1x4
6x4
=
4
24
Now, both fractions have same denominator and we are ready to subtract
9
24
-
4
24
=
9-4
24
=
5
24
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