Subtract 14/54 from 7/21
7/21 - 14/54 is 2/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
7/21 = 7 × 18/21 × 18 = 126/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
14/54 = 14 × 7/54 × 7 = 98/378 - Subtract the two like fractions:
126/378 - 98/378 = 126 - 98/378 = 28/378 - After reducing the fraction, the answer is 2/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-14/54 7/21-28/54 7/42-14/54 7/21-42/54 7/63-14/54 35/21-14/54 7/21-70/54 49/21-14/54 7/21-98/54