Subtract 56/10 from 21/7
1st number: 3 0/7, 2nd number: 5 6/10
21/7 - 56/10 is -13/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
56/10 = 56 × 7/10 × 7 = 392/70 - Subtract the two like fractions:
210/70 - 392/70 = 210 - 392/70 = -182/70 - After reducing the fraction, the answer is -13/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7-56/10 21/14-56/10 21/7-56/20 63/7-56/10 21/7-56/30 21/35-56/10 21/7-56/50 21/49-56/10 21/7-56/70