How do you get the common numerator for 3 fractions?

Answer 1

I'm not sure why you'd want to. You would get a common numerator of three fractions by finding the LCM of the numerators, but you would still have to find the common denominator to do anything with them. Assuming that's what you meant in the first place, you find a common denominator by finding the LCM of the denominators.

Example: 1/3, 2/5, 5/6. The LCM of 3, 5 and 6 is 30.

1/3 = 10/30

2/5 = 12/30

5/6 = 25/30

Now you can add or subtract them however you'd like.

Answer 2

There is no need to find a common numerator. What you normally need, to add, subtract, or compare fractions, is to find a common denominator. One way to find a common denominator is to multiply all the denominators. Since this may give numbers that are inconveniently large, you may prefer to find the leastcommon denominator. In this case, you can use the prime factorization for each denominator, to eliminate common factors. Just multiply all the prime factors that appear in any of the numbers. Use the highest power for each prime factor.

Answer 3

Factors are integers. Any integer can become a fraction by writing it over 1.