Subtract 12/96 from 1/42, Solve 1/42

Subtract 12/96 from 1/42

1/42 - 12/96 is -17/168.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 96 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 42 × 16 = 672,
1/42 = 1 × 16/42 × 16 = 16/672
Likewise, for the 2nd fraction, since 96 × 7 = 672,
12/96 = 12 × 7/96 × 7 = 84/672
Subtract the two like fractions:
16/672 - 84/672 = 16 - 84/672 = -68/672
After reducing the fraction, the answer is -17/168

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