How can factors help you find a common denominator?

Answer 1

They can help you find a common denominator by the bottoms one of each fraction if the top ones don't have the same denominator. Then find the simplest or non-simplest denominator. Like when you have 2/7+ 2/3=? Well that equals: 20/21. How you find that out is by finding what 7 and 3 have in common is by using a multiplication table until you reach a number they both equal because 7X3= 21 so that's how you get the bottom number. Then you just add the top and that's how you do fractions and the denominator.

Answer 2

The process of finding a lowest common denominator is the same as finding a least common multiple. Example: 1/30 and 1/42

2 x 3 x 5 = 30

2 x 3 x 7 = 42

2 x 3 x 5 x 7 = 210

210 is the lowest common denominator.

Answer 3

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Answer 4

Hahha