Subtract 12/21 from 5/27
5/27 - 12/21 is -73/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
5/27 = 5 × 7/27 × 7 = 35/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
12/21 = 12 × 9/21 × 9 = 108/189 - Subtract the two like fractions:
35/189 - 108/189 = 35 - 108/189 = -73/189
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