Since 63 is a multiple of 9, it is automatically the LCM.
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The lowest common multiple of 7 and 9 is 63.Here's how to work it out:Multiples of 9 are: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, ...Multiples of 7 are: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, ...To find the lowest common multiple you look and find the smallest number that is a multiple of both numbers (in your case 7 and 9). So, in this case the lowest multiple they both have in common is 63.637963The Least Common Multiple (LCM) for 7 9 is 63.
Since 63 is a multiple of 9, it is automatically the LCM of this problem.
Since 63 is a multiple of 9, it is automatically the LCM.
A common multiple of 9 and 21 is 63
The Least Common Multiple (LCM) for 9 63 is 63.