Subtract 20/7 from 81/27
1st number: 3 0/27, 2nd number: 2 6/7
81/27 - 20/7 is 1/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 7 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
81/27 = 81 × 7/27 × 7 = 567/189 - Likewise, for the 2nd fraction, since 7 × 27 = 189,
20/7 = 20 × 27/7 × 27 = 540/189 - Subtract the two like fractions:
567/189 - 540/189 = 567 - 540/189 = 27/189 - After reducing the fraction, the answer is 1/7
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