To find the common denominator of two fractions, you find the least common multiple of the denominators. The multiply the numerators by whatever you multiplied the denominator by to get an equivalent fraction.
example:
1 + 2 = 10
3 4 12
the least common multiple of 3 and 4 is 12 so,
4 + 6 = 10
12 12 12 which can be reduced to the answer of 5
6
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By finding the lowest common denominator of the fractions.
Find the lowest common denominator by finding the lowest common multiple of the denominators
By finding their lowest common denominator
by finding the common denominator of the fractions
By finding their lowest common denominator and then alter the numerator and denominator of the given fractions accordingly