Subtract 12/21 from 10/63
10/63 - 12/21 is -26/63.
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,
12/21 = 12 × 3/21 × 3 = 36/63 - Subtract the two like fractions:
10/63 - 36/63 = 10 - 36/63 = -26/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/63-12/21 10/63-24/21 10/63-12/42 30/63-12/21 10/63-36/21 10/63-12/63 50/63-12/21 10/63-60/21 70/63-12/21 10/63-84/21