Subtract 63/30 from 27/42, Solve 27/42

Subtract 63/30 from 27/42

1^st number: 27/42, 2^nd number: 2 3/30

27/42 - 63/30 is -51/35.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210

Next, find the equivalent fraction of both fractional numbers with denominator 210
For the 1st fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210
Likewise, for the 2nd fraction, since 30 × 7 = 210,
63/30 = 63 × 7/30 × 7 = 441/210
Subtract the two like fractions:
135/210 - 441/210 = 135 - 441/210 = -306/210
After reducing the fraction, the answer is -51/35

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