Subtract 4/12 from 1/28
1/28 - 4/12 is -25/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
1/28 = 1 × 3/28 × 3 = 3/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
4/12 = 4 × 7/12 × 7 = 28/84 - Subtract the two like fractions:
3/84 - 28/84 = 3 - 28/84 = -25/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/28-4/12 1/28-8/12 1/56-4/12 1/28-4/24 3/28-4/12 1/84-4/12 1/28-4/36 5/28-4/12 1/28-20/12 1/28-4/60 7/28-4/12 1/28-28/12 1/28-4/84