Subtract 35/21 from 3/8, Solve 3/8 - 1 14/21 as a fraction

Subtract 35/21 from 3/8

1^st number: 3/8, 2^nd number: 1 14/21

3/8 - 35/21 is -31/24.

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,
3/8 = 3 × 21/8 × 21 = 63/168
Likewise, for the 2nd fraction, since 21 × 8 = 168,
35/21 = 35 × 8/21 × 8 = 280/168
Subtract the two like fractions:
63/168 - 280/168 = 63 - 280/168 = -217/168
After reducing the fraction, the answer is -31/24

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