Subtract 27/14 from 21/27
1st number: 21/27, 2nd number: 1 13/14
21/27 - 27/14 is -145/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 14 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 27 × 14 = 378,
21/27 = 21 × 14/27 × 14 = 294/378 - Likewise, for the 2nd fraction, since 14 × 27 = 378,
27/14 = 27 × 27/14 × 27 = 729/378 - Subtract the two like fractions:
294/378 - 729/378 = 294 - 729/378 = -435/378 - After reducing the fraction, the answer is -145/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/27-27/14 21/27-54/14 21/54-27/14 21/27-27/28 63/27-27/14 21/27-81/14 21/81-27/14 21/27-27/42 21/27-27/70 21/27-27/98