Subtract 90/42 from 9/56, Solve 9/56

Subtract 90/42 from 9/56

1^st number: 9/56, 2^nd number: 2 6/42

9/56 - 90/42 is -111/56.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 42 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 56 × 3 = 168,
9/56 = 9 × 3/56 × 3 = 27/168
Likewise, for the 2nd fraction, since 42 × 4 = 168,
90/42 = 90 × 4/42 × 4 = 360/168
Subtract the two like fractions:
27/168 - 360/168 = 27 - 360/168 = -333/168
After reducing the fraction, the answer is -111/56

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