Subtract 25/15 from 27/42, Solve 27/42

Subtract 25/15 from 27/42

1^st number: 27/42, 2^nd number: 1 10/15

27/42 - 25/15 is -43/42.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 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 15 × 14 = 210,
25/15 = 25 × 14/15 × 14 = 350/210
Subtract the two like fractions:
135/210 - 350/210 = 135 - 350/210 = -215/210
After reducing the fraction, the answer is -43/42

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