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Grade-4
Subtracting Fractions With Unlike Denominators - Word Problems
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Yesterday there was a blizzard, and it snowed
4
6
inches. Today, the sun came out and melted
1
9
inches of snow. How many inches of snow are left?
(Solve and reduce the fraction.)
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 6 and 9 is 18.
Now, we have to make sure both fractions have the same new denominator 18.
You can write fraction
4
6
as
4x3
6x3
=
12
18
You can write fraction
1
9
as
1x2
9x2
=
2
18
Now, both fractions have same denominator and we are ready to subtract
12
18
-
2
18
=
12-2
18
=
10
18
That can be simplified to
=
5
9
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