Subtract 3/63 from 5/21
5/21 - 3/63 is 4/21.
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,
3/63 = 3 × 1/63 × 1 = 3/63 - Subtract the two like fractions:
15/63 - 3/63 = 15 - 3/63 = 12/63 - After reducing the fraction, the answer is 4/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-3/63 5/21-6/63 5/42-3/63 15/21-3/63 5/21-9/63 5/63-3/63 25/21-3/63 5/21-15/63 35/21-3/63 5/21-21/63