Subtract 21/28 from 4/63
4/63 - 21/28 is -173/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
4/63 = 4 × 4/63 × 4 = 16/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
21/28 = 21 × 9/28 × 9 = 189/252 - Subtract the two like fractions:
16/252 - 189/252 = 16 - 189/252 = -173/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/63-21/28 4/63-42/28 4/63-21/56 12/63-21/28 4/63-63/28 4/63-21/84 20/63-21/28 28/63-21/28