Subtract 49/14 from 20/21
1st number: 20/21, 2nd number: 3 7/14
20/21 - 49/14 is -107/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
20/21 = 20 × 2/21 × 2 = 40/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
49/14 = 49 × 3/14 × 3 = 147/42 - Subtract the two like fractions:
40/42 - 147/42 = 40 - 147/42 = -107/42
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