Subtract 60/27 from 15/42, Solve 15/42

Subtract 60/27 from 15/42

1^st number: 15/42, 2^nd number: 2 6/27

15/42 - 60/27 is -235/126.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 42 × 9 = 378,
15/42 = 15 × 9/42 × 9 = 135/378
Likewise, for the 2nd fraction, since 27 × 14 = 378,
60/27 = 60 × 14/27 × 14 = 840/378
Subtract the two like fractions:
135/378 - 840/378 = 135 - 840/378 = -705/378
After reducing the fraction, the answer is -235/126

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