Subtract 4/21 from 2/81
2/81 - 4/21 is -94/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 21 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
2/81 = 2 × 7/81 × 7 = 14/567 - Likewise, for the 2nd fraction, since 21 × 27 = 567,
4/21 = 4 × 27/21 × 27 = 108/567 - Subtract the two like fractions:
14/567 - 108/567 = 14 - 108/567 = -94/567
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