Question: what is the least common factor of 7 and 9?
Answer: Since the only number that 7 and 9 go into evenly is 63 we must consider this simple step:
A least common multiple is the smallest unit that both numbers can evenly be divided by. Since you can evenly divide 63 by both 7 and 9 the following is true:
63 is the least common multiple of 7 and 9 .