Subtract 7/28 from 20/27
20/27 - 7/28 is 53/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 28 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
20/27 = 20 × 28/27 × 28 = 560/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
7/28 = 7 × 27/28 × 27 = 189/756 - Subtract the two like fractions:
560/756 - 189/756 = 560 - 189/756 = 371/756 - After reducing the fraction, the answer is 53/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/27-7/28 20/27-14/28 20/54-7/28 20/27-7/56 60/27-7/28 20/27-21/28 20/81-7/28 20/27-7/84 20/27-35/28 20/27-49/28