Subtract 14/21 from 12/8, Solve 1 4/8

Subtract 14/21 from 12/8

1^st number: 1 4/8, 2^nd number: 14/21

12/8 - 14/21 is 5/6.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 8 × 21 = 168,
12/8 = 12 × 21/8 × 21 = 252/168
Likewise, for the 2nd fraction, since 21 × 8 = 168,
14/21 = 14 × 8/21 × 8 = 112/168
Subtract the two like fractions:
252/168 - 112/168 = 252 - 112/168 = 140/168
After reducing the fraction, the answer is 5/6

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