2006-11-07 10:57:04 · 5 answers · asked by Josephine R 1 in Science & Mathematics ➔ Mathematics
LCD is the Least common denominator.
There are a lot of ways teachers solve this problem but the most common is using factorization.
example: find the LCD of 1/8 and 5/14?
The denominators are 8 and 14.
Factor the 2 numbers into its prime factors:
8 = 2*2*2
14 = 2*7 (notice how i wrote the factors of 14.
make sure common factors are aligned.)
LCD = 2*2*2*7
= 56
Note: If the denominators are relatively prime (meaning there are no common factors) all you have to do is multiply them. example 5 and 8 are realtively prime, thus the LCD of 5 and 8 is 5*8 = 40.
2006-11-07 11:05:21 · answer #1 · answered by naglibog 2 · 1⤊ 0⤋
LCD for 1/3 and 1/9 is 1/9 it depends on the numbers you have (try to factor)
2006-11-07 18:58:37 · answer #2 · answered by bourqueno77 4 · 0⤊ 0⤋
FIRST YOU HAVE TO MAKE A LIST OF THE MUTIBLES OF THE NUMBER THAN YOU SEE WICH ONE ARE THE SAME AND ARE THE SMALLEST AND THERE YOU HAVE FOUND IT
2006-11-07 19:05:28 · answer #3 · answered by IHATELOVE42 1 · 0⤊ 1⤋
take both bottom numbers and find the lcm
2006-11-07 18:59:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋
multiply denominators together. it usually works.
2006-11-07 18:58:47 · answer #5 · answered by thundergnome 3 · 0⤊ 0⤋