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What is the LCD for 11/21 and 31/45? A.) 945 B.)315 C.)66 D.)105
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3 votes
What is the LCD for 11/21 and 31/45?
A.) 945
B.)315
C.)66
D.)105

User Lluis Sanchez
by
7.3k points

2 Answers

4 votes
The LCD is the Least common multiple of 21 and 45, which is the product of the highest occurring primes of the numbers prime factorizations.

21=3*7, 45=3*3*5 so the LCM of 21 and 45 is 3*3*5*7=315

So the LCD is 315
User NSquid
by
8.0k points
4 votes
B) 315 is the LCD FOR 11/21 AND 31/45
User Eugene Shmorgun
by
9.2k points
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