Subtract 30/6 from 42/56, Solve 42/56

Subtract 30/6 from 42/56

1^st number: 42/56, 2^nd number: 5 0/6

42/56 - 30/6 is -17/4.

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,
42/56 = 42 × 3/56 × 3 = 126/168
Likewise, for the 2nd fraction, since 6 × 28 = 168,
30/6 = 30 × 28/6 × 28 = 840/168
Subtract the two like fractions:
126/168 - 840/168 = 126 - 840/168 = -714/168
After reducing the fraction, the answer is -17/4

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