Subtract 16/54 from 21/28
21/28 - 16/54 is 49/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 54 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 28 × 27 = 756,
21/28 = 21 × 27/28 × 27 = 567/756 - Likewise, for the 2nd fraction, since 54 × 14 = 756,
16/54 = 16 × 14/54 × 14 = 224/756 - Subtract the two like fractions:
567/756 - 224/756 = 567 - 224/756 = 343/756 - After reducing the fraction, the answer is 49/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28-16/54 21/28-32/54 21/56-16/54 63/28-16/54 21/28-48/54 21/84-16/54 21/28-80/54