Subtract 56/30 from 21/12
1st number: 1 9/12, 2nd number: 1 26/30
21/12 - 56/30 is -7/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
56/30 = 56 × 2/30 × 2 = 112/60 - Subtract the two like fractions:
105/60 - 112/60 = 105 - 112/60 = -7/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-56/30 21/24-56/30 21/12-56/60 63/12-56/30 21/36-56/30 21/12-56/90 21/60-56/30 21/84-56/30