Subtract 28/63 from 3/7
3/7 - 28/63 is -1/63.
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,
3/7 = 3 × 9/7 × 9 = 27/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
28/63 = 28 × 1/63 × 1 = 28/63 - Subtract the two like fractions:
27/63 - 28/63 = 27 - 28/63 = -1/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-28/63 3/7-56/63 3/14-28/63 9/7-28/63 3/7-84/63 3/21-28/63 15/7-28/63 3/35-28/63 21/7-28/63 3/49-28/63