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Grade-4
Adding Fractions With Unlike Denominators - Word Problems
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Jonathan prints T-shirts.
1
9
of the T-shirts he printed today were black and
1
8
of the T-shirts printed were white. How many black T-shirts and white T-shirts did Jonathan print today?
(Solve and reduce the fraction.)
Explanation
Remember, we cannot add fractions until the denominators are same. So, we have to find the least common denominator.
Least Common Denominator (LCD) of 9 and 8 is 72.
Now, we have to make sure both fractions have the same new denominator 72.
You can write fraction
1
9
as
1x8
9x8
=
8
72
You can write fraction
1
8
as
1x9
8x9
=
9
72
Now, both fractions have same denominator and we are ready to add
8
72
+
9
72
=
8+9
72
=
17
72
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