Subtract 10/27 from 21/63
21/63 - 10/27 is -1/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 63 × 3 = 189,
21/63 = 21 × 3/63 × 3 = 63/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
10/27 = 10 × 7/27 × 7 = 70/189 - Subtract the two like fractions:
63/189 - 70/189 = 63 - 70/189 = -7/189 - After reducing the fraction, the answer is -1/27
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