Subtract 63/21 from 63/27
1st number: 2 9/27, 2nd number: 3 0/21
63/27 - 63/21 is -2/3.
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,
63/27 = 63 × 7/27 × 7 = 441/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
63/21 = 63 × 9/21 × 9 = 567/189 - Subtract the two like fractions:
441/189 - 567/189 = 441 - 567/189 = -126/189 - After reducing the fraction, the answer is -2/3
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