Subtract 72/27 from 12/7
1st number: 1 5/7, 2nd number: 2 18/27
12/7 - 72/27 is -20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 7 × 27 = 189,
12/7 = 12 × 27/7 × 27 = 324/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
72/27 = 72 × 7/27 × 7 = 504/189 - Subtract the two like fractions:
324/189 - 504/189 = 324 - 504/189 = -180/189 - After reducing the fraction, the answer is -20/21
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