Subtract 27/16 from 15/42, Solve 15/42

Subtract 27/16 from 15/42

1^st number: 15/42, 2^nd number: 1 11/16

15/42 - 27/16 is -149/112.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 16 is 336

Next, find the equivalent fraction of both fractional numbers with denominator 336
For the 1st fraction, since 42 × 8 = 336,
15/42 = 15 × 8/42 × 8 = 120/336
Likewise, for the 2nd fraction, since 16 × 21 = 336,
27/16 = 27 × 21/16 × 21 = 567/336
Subtract the two like fractions:
120/336 - 567/336 = 120 - 567/336 = -447/336
After reducing the fraction, the answer is -149/112

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