Subtract 21/12 from 14/70, Solve 14/70

Subtract 21/12 from 14/70

1^st number: 14/70, 2^nd number: 1 9/12

14/70 - 21/12 is -31/20.

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

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 70 × 6 = 420,
14/70 = 14 × 6/70 × 6 = 84/420
Likewise, for the 2nd fraction, since 12 × 35 = 420,
21/12 = 21 × 35/12 × 35 = 735/420
Subtract the two like fractions:
84/420 - 735/420 = 84 - 735/420 = -651/420
After reducing the fraction, the answer is -31/20

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