Subtract 4/9 from 4/21
421 - 49 is -1663.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
421 = 4 × 321 × 3 = 1263 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
49 = 4 × 79 × 7 = 2863 - Subtract the two like fractions:
1263 - 2863 = 12 - 2863 = -1663
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-4/9 4/21-8/9 4/42-4/9 4/21-4/18 12/21-4/9 4/21-12/9 4/63-4/9 4/21-4/27 20/21-4/9 4/21-20/9 4/21-4/45 28/21-4/9 4/21-28/9 4/21-4/63