Subtract 49/5 from 4/21
1st number: 4/21, 2nd number: 9 4/5
4/21 - 49/5 is -1009/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
49/5 = 49 × 21/5 × 21 = 1029/105 - Subtract the two like fractions:
20/105 - 1029/105 = 20 - 1029/105 = -1009/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-49/5 4/21-98/5 4/42-49/5 4/21-49/10 12/21-49/5 4/63-49/5 4/21-49/15 20/21-49/5 4/21-49/25 28/21-49/5 4/21-49/35