Subtract 63/20 from 3/7
1st number: 3/7, 2nd number: 3 3/20
3/7 - 63/20 is -381/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
3/7 = 3 × 20/7 × 20 = 60/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
63/20 = 63 × 7/20 × 7 = 441/140 - Subtract the two like fractions:
60/140 - 441/140 = 60 - 441/140 = -381/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-63/20 3/14-63/20 3/7-63/40 9/7-63/20 3/21-63/20 3/7-63/60 15/7-63/20 3/35-63/20 21/7-63/20 3/49-63/20