Subtract 25/63 from 4/21
4/21 - 25/63 is -13/63.
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,
4/21 = 4 × 3/21 × 3 = 12/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
25/63 = 25 × 1/63 × 1 = 25/63 - Subtract the two like fractions:
12/63 - 25/63 = 12 - 25/63 = -13/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-25/63 4/21-50/63 4/42-25/63 12/21-25/63 4/21-75/63 4/63-25/63 20/21-25/63 28/21-25/63