Question 123049: what's the lcd of these fractions?
3/4, 3/8, 1/5
Found 2 solutions by rapaljer, checkley71:
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! Take the largest denominator, which in this case is 8. Take multiples of 8 until you find one that is evenly divisible by the other denominators. In this case, start with multiples of 8, such as 8, 16, 24, 32, 40, 48, etc. and find a number that is divisible by both 4 and 5. The first (smallest) such number is 40. Therefore the LCD=40.
This is my own "non-traditional" method. There are other methods of course, but this one USUALLY works well!
R^2
Answer by checkley71(8403)  (Show Source):
You can put this solution on YOUR website! FIRST WE FACTOR ALL THE DENOMINATORS:
(2*2)=4
(2*2)2=8
5=5
NOW, USING ONLY ONCE THE COMMON FACTORS WE MULTIPLY THEM & GET:
(2*2)*2*5)=40 IS THE LCD.
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