Subtract 7/21 from 10/63
10/63 - 7/21 is -11/63.
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,
10/63 = 10 × 1/63 × 1 = 10/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
7/21 = 7 × 3/21 × 3 = 21/63 - Subtract the two like fractions:
10/63 - 21/63 = 10 - 21/63 = -11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/63-7/21 10/63-14/21 10/63-7/42 30/63-7/21 10/63-7/63 50/63-7/21 10/63-35/21 70/63-7/21 10/63-49/21