Subtract 81/70 from 2/12, Solve 2/12

Subtract 81/70 from 2/12

1^st number: 2/12, 2^nd number: 1 11/70

2/12 - 81/70 is -104/105.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 12 × 35 = 420,
2/12 = 2 × 35/12 × 35 = 70/420
Likewise, for the 2nd fraction, since 70 × 6 = 420,
81/70 = 81 × 6/70 × 6 = 486/420
Subtract the two like fractions:
70/420 - 486/420 = 70 - 486/420 = -416/420
After reducing the fraction, the answer is -104/105

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