Subtract 56/6 from 28/21
1st number: 1 7/21, 2nd number: 9 2/6
28/21 - 56/6 is -8/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
28/21 = 28 × 2/21 × 2 = 56/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
56/6 = 56 × 7/6 × 7 = 392/42 - Subtract the two like fractions:
56/42 - 392/42 = 56 - 392/42 = -336/42 - After reducing the fraction, the answer is -8/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21-56/6 28/42-56/6 28/21-56/12 84/21-56/6 28/63-56/6 28/21-56/18 28/21-56/30 28/21-56/42