Subtract 4/21 from 5/63
5/63 - 4/21 is -1/9.
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,
5/63 = 5 × 1/63 × 1 = 5/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
4/21 = 4 × 3/21 × 3 = 12/63 - Subtract the two like fractions:
5/63 - 12/63 = 5 - 12/63 = -7/63 - After reducing the fraction, the answer is -1/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/63-4/21 5/63-8/21 5/63-4/42 15/63-4/21 5/63-12/21 5/63-4/63 25/63-4/21 5/63-20/21 35/63-4/21 5/63-28/21