Subtract 3/7 from 3/28
3/28 - 3/7 is -9/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
3/28 = 3 × 1/28 × 1 = 3/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
3/7 = 3 × 4/7 × 4 = 12/28 - Subtract the two like fractions:
3/28 - 12/28 = 3 - 12/28 = -9/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-3/7 3/28-6/7 3/56-3/7 3/28-3/14 9/28-3/7 3/28-9/7 3/84-3/7 3/28-3/21 15/28-3/7 3/28-15/7 3/28-3/35 21/28-3/7 3/28-21/7 3/28-3/49