Finding Lowest Common Denominator (LCD)
The lowest common denominator or least common
denominator (abbreviated LCD) is the least common
multiple of a set of fractions. It is the smallest number
that both denominators can divide by evenly.
Example: The LCD of the fraction below is 36
36 least common multiples of 12
and 18 is 36 or the smallest
number that both 12 and 18 can
divide by evenly (with no remainder.
These two fractions can know be added or subtracted