Free LCM Calculator determines the least common multiple (LCM) between 9 and 21 the smallest integer that is 63 that is divisible by both numbers. Least Common Multiple (LCM) of 9 and 21 is 63.
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Prime Factorization of 21.
3 21
7 7
1
Isn’t there supposed to be a picture?
The answer should be 5/a-a=0
C because 4 1/3= 13/3
Then (13/3)x9= 39
Lastly 39+4= 43