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| Math Central | Quandaries & Queries |
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Question from Jackson, a student: I am having trouble getting the LCD for the following question. |
Hi Jackson,
You should first take the mixed fraction 1 3/8 and write it as a common fraction. So 1 /8 is one and three eights but one is eight eights so 1 3/8 = 8/8 + 3/8 = 11/8.
Remember what LCD stands for (lowest common DENOMINATOR) and the denominator is on the bottom. So, what multiples do 8 and 9 have?
8 9
16 18
24 27
32 36
40 45
48 54
56 63
72 72 <------
80 81
This must be the LCD.
Good luck
Melanie
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