Subtract 4/63 from 5/21
5/21 - 4/63 is 11/63.
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,
5/21 = 5 × 3/21 × 3 = 15/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
4/63 = 4 × 1/63 × 1 = 4/63 - Subtract the two like fractions:
15/63 - 4/63 = 15 - 4/63 = 11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-4/63 5/21-8/63 5/42-4/63 15/21-4/63 5/21-12/63 5/63-4/63 25/21-4/63 5/21-20/63 35/21-4/63 5/21-28/63