Subtract 20/63 from 12/9
1st number: 1 3/9, 2nd number: 20/63
12/9 - 20/63 is 64/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Subtract the two like fractions:
84/63 - 20/63 = 84 - 20/63 = 64/63 - In mixed form: 11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9-20/63 12/9-40/63 12/18-20/63 36/9-20/63 12/9-60/63 12/27-20/63 60/9-20/63 12/45-20/63 84/9-20/63 12/63-20/63