7/210 = 1/30 = 0.033... recurring.
A common denominator is 210.
The lowest common denominator of 5/42 and 7/30 is 210.
210
210
It is 210
210
7 x 6 x 5 = 210
7 x 30 = 210 which also can be the lowest common denominator for 5,6,7 believe it or not!
The lowest common denominator of 30 and 42 is 210.
210
The greatest common denominator is an infinite number and not very practical for problem solving. The GCF is 7. The LCM is 210.
It's the same process as finding the least common multiple. Example: 7/30 + 13/42 Factor them. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 Combine the factors, eliminating duplicates. 2 x 3 x 5 x 7 = 210, the LCM Since 210 is the lowest common denominator, we can proceed to add them. 7/30 = 49/210 13/42 = 65/210 7/30 + 13/42 = 114/210 or 19/35 in lowest terms.