Subtract 27/21 from 12/27
1st number: 12/27, 2nd number: 1 6/21
12/27 - 27/21 is -53/63.
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,
12/27 = 12 × 7/27 × 7 = 84/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
27/21 = 27 × 9/21 × 9 = 243/189 - Subtract the two like fractions:
84/189 - 243/189 = 84 - 243/189 = -159/189 - After reducing the fraction, the answer is -53/63
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