Subtract 6/21 from 3/28
3/28 - 6/21 is -5/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
3/28 = 3 × 3/28 × 3 = 9/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
6/21 = 6 × 4/21 × 4 = 24/84 - Subtract the two like fractions:
9/84 - 24/84 = 9 - 24/84 = -15/84 - After reducing the fraction, the answer is -5/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-6/21 3/28-12/21 3/56-6/21 3/28-6/42 9/28-6/21 3/28-18/21 3/84-6/21 3/28-6/63 15/28-6/21 3/28-30/21 21/28-6/21 3/28-42/21