Subtract 5/21 from 3/27
3/27 - 5/21 is -8/63.
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,
3/27 = 3 × 7/27 × 7 = 21/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
5/21 = 5 × 9/21 × 9 = 45/189 - Subtract the two like fractions:
21/189 - 45/189 = 21 - 45/189 = -24/189 - After reducing the fraction, the answer is -8/63
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