Question

LCD and LCM questions Please help fan and medal.
What is the LCD of 1/2 and 3/5?
A.2
B.7
C.10
D.20
@iGreen @uChezzy @undeadknight26 @phi @KittyT

Answer 1

have you learned any ways to find the Least Common Divisor?

Answer 2

you mean least common denominator? then I can't remember how this is a review and I need help.

Answer 3

For 2 and 5, I would "factor" them into their prime factors. (If you know how)
in this case, they are both primes, so we are done.
then multiply the factors: 2*5 to get 10

Answer 4

so its C?

Answer 5

yes

Answer 6

thank you soo much fanned and medaled

Answer 7

ok, but it's better if you get the idea.

For 2 and 10 we would factor 2 into 2, and 10 into 2*5
now the LCD is 2*5 (from 10). and we already have a 2 (for the 2), so we are done.
10 is the answer.