Subtract 25/28 from 1/27
1/27 - 25/28 is -647/756.
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,
1/27 = 1 × 28/27 × 28 = 28/756 - Likewise, for the 2nd fraction, since 28 × 27 = 756,
25/28 = 25 × 27/28 × 27 = 675/756 - Subtract the two like fractions:
28/756 - 675/756 = 28 - 675/756 = -647/756
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/27-25/28 1/27-50/28 1/54-25/28 1/27-25/56 3/27-25/28 1/27-75/28 1/81-25/28 1/27-25/84 5/27-25/28 7/27-25/28