Subtract 27/28 from 4/5
4/5 - 27/28 is -23/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
4/5 = 4 × 28/5 × 28 = 112/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
27/28 = 27 × 5/28 × 5 = 135/140 - Subtract the two like fractions:
112/140 - 135/140 = 112 - 135/140 = -23/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/5-27/28 4/5-54/28 4/10-27/28 4/5-27/56 12/5-27/28 4/5-81/28 4/15-27/28 4/5-27/84 20/5-27/28 4/25-27/28 28/5-27/28 4/35-27/28