Subtract 4/21 from 15/63
15/63 - 4/21 is 1/21.
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,
15/63 = 15 × 1/63 × 1 = 15/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
4/21 = 4 × 3/21 × 3 = 12/63 - Subtract the two like fractions:
15/63 - 12/63 = 15 - 12/63 = 3/63 - After reducing the fraction, the answer is 1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63-4/21 15/63-8/21 15/63-4/42 45/63-4/21 15/63-12/21 15/63-4/63 75/63-4/21 15/63-20/21 15/63-28/21