Wiki User
∙ 10y agoThe LCD of 7/8 and 1/3 is 24.
Wiki User
∙ 10y agoWhich you don't want. You want the least common denominator, which is 360.
20
280
Somone put 30, but seven doesnt go into it
The LCD of 3/4 and 7/9 is 36.
24
the common denominator for 9/8 and 7/20 is 40. (45/40 and 14/40)
8
16 is the common denominator. 3/4=12/16 7/16=7/16 5/8=10/16
Which you don't want. You want the least common denominator, which is 360.
168.
Just do the usual steps to add fractions. First, find the common denominator (8, in this case). Second, convert both fractions to the common denominator. Third, add the numerators.
8
It is 48
8
20
280