I will need this for tomorrow so I need anyone to reply today.

asked Oct 13, 2016 in Other Math Topics by Jean Jara

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:

To avoid this verification in future, please log in or register.

1 Answer

If there are two or more denominators, each one can be split into its factors (if it has any). If each denominator is a prime (no factors) then the LCD is the product of all of them. The same applies if they have no common factors. For example: 2, 3 and 5 are prime so their LCD is 2*3*5=30; 2, 5 and 9 have no common factors so their LCD is 2*5*9=90.

The LCD of denominators with a common factor C means we can write each denominator as a*C (or simply aC), bC and cC where a, b and c are whole numbers. For example, if C is 2 and we have to find the LCD of 4, 6 and 10 we can write 4=2*2, 6=2*3 and 10=2*5. The LCD is 2*2*3*5=60. If we look at the LCD in terms of its factors we can see that there are two 2s, a 2 and a 3, and a 2 and a 5, so that means 2*2 (4), 2*3 (6) and 2*5 (10) will go into the LCD.

The LCD of a number and a multiple of the number is always the multiple. So the LCD of 2 and 4 is 4 because 2 goes into 4.

I hope this helps.

answered Oct 13, 2016 by Rod Top Rated User (442,380 points)

Related questions

Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!
78,526 questions
82,363 answers
63,405 users