Subtract 21/98 from 20/12, Solve 1 8/12

Subtract 21/98 from 20/12

1^st number: 1 8/12, 2^nd number: 21/98

20/12 - 21/98 is 61/42.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 98 is 588

Next, find the equivalent fraction of both fractional numbers with denominator 588
For the 1st fraction, since 12 × 49 = 588,
20/12 = 20 × 49/12 × 49 = 980/588
Likewise, for the 2nd fraction, since 98 × 6 = 588,
21/98 = 21 × 6/98 × 6 = 126/588
Subtract the two like fractions:
980/588 - 126/588 = 980 - 126/588 = 854/588
After reducing the fraction, the answer is 61/42
In mixed form: 119/42

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