Subtract 20/63 from 12/7
1st number: 1 5/7, 2nd number: 20/63
12/7 - 20/63 is 88/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
12/7 = 12 × 9/7 × 9 = 108/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
20/63 = 20 × 1/63 × 1 = 20/63 - Subtract the two like fractions:
108/63 - 20/63 = 108 - 20/63 = 88/63 - In mixed form: 125/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-20/63 12/7-40/63 12/14-20/63 36/7-20/63 12/7-60/63 12/21-20/63 60/7-20/63 12/35-20/63 84/7-20/63 12/49-20/63