Subtract 36/27 from 12/21
1st number: 12/21, 2nd number: 1 9/27
12/21 - 36/27 is -16/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
12/21 = 12 × 9/21 × 9 = 108/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
36/27 = 36 × 7/27 × 7 = 252/189 - Subtract the two like fractions:
108/189 - 252/189 = 108 - 252/189 = -144/189 - After reducing the fraction, the answer is -16/21
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