
Arturo O. answered 11/07/17
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Factor 12 and 56 into prime numbers, cancel common factors when you take the ratio, and simplify.
12 = 2 x 2 x 3
56 = 2 x 2 x 2 x 7
12/56 = (2 x 2 x 3) / (2 x 2 x 2 x 7)
Note that both the numerator and denominator have 2 x 2.
12/56 = 3 / (2 x 7) = 3/14