Subtract 45/6 from 20/56, Solve 20/56

Subtract 45/6 from 20/56

1^st number: 20/56, 2^nd number: 7 3/6

20/56 - 45/6 is -50/7.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 6 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 56 × 3 = 168,
20/56 = 20 × 3/56 × 3 = 60/168
Likewise, for the 2nd fraction, since 6 × 28 = 168,
45/6 = 45 × 28/6 × 28 = 1260/168
Subtract the two like fractions:
60/168 - 1260/168 = 60 - 1260/168 = -1200/168
After reducing the fraction, the answer is -50/7

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