Subtract 49/10 from 4/21
1st number: 4/21, 2nd number: 4 9/10
4/21 - 49/10 is -989/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
4/21 = 4 × 10/21 × 10 = 40/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
49/10 = 49 × 21/10 × 21 = 1029/210 - Subtract the two like fractions:
40/210 - 1029/210 = 40 - 1029/210 = -989/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-49/10 4/21-98/10 4/42-49/10 4/21-49/20 12/21-49/10 4/63-49/10 4/21-49/30 20/21-49/10 4/21-49/50 28/21-49/10 4/21-49/70