Subtract 14/27 from 7/21
7/21 - 14/27 is -5/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
7/21 = 7 × 9/21 × 9 = 63/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
14/27 = 14 × 7/27 × 7 = 98/189 - Subtract the two like fractions:
63/189 - 98/189 = 63 - 98/189 = -35/189 - After reducing the fraction, the answer is -5/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-14/27 7/21-28/27 7/42-14/27 7/21-14/54 7/21-42/27 7/63-14/27 7/21-14/81 35/21-14/27 7/21-70/27 49/21-14/27 7/21-98/27