Subtract 56/63 from 1/21
1/21 - 56/63 is -53/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
1/21 = 1 × 3/21 × 3 = 3/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
56/63 = 56 × 1/63 × 1 = 56/63 - Subtract the two like fractions:
3/63 - 56/63 = 3 - 56/63 = -53/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-56/63 1/42-56/63 3/21-56/63 1/63-56/63 5/21-56/63 7/21-56/63