Subtract 4/21 from 1/63
1/63 - 4/21 is -11/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
1/63 = 1 × 1/63 × 1 = 1/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
4/21 = 4 × 3/21 × 3 = 12/63 - Subtract the two like fractions:
1/63 - 12/63 = 1 - 12/63 = -11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/63-4/21 1/63-8/21 1/63-4/42 3/63-4/21 1/63-12/21 1/63-4/63 5/63-4/21 1/63-20/21 7/63-4/21 1/63-28/21