Subtract 21/10 from 20/49
1st number: 20/49, 2nd number: 2 1/10
20/49 - 21/10 is -829/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 10 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 49 × 10 = 490,
20/49 = 20 × 10/49 × 10 = 200/490 - Likewise, for the 2nd fraction, since 10 × 49 = 490,
21/10 = 21 × 49/10 × 49 = 1029/490 - Subtract the two like fractions:
200/490 - 1029/490 = 200 - 1029/490 = -829/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/49-21/10 20/49-42/10 20/98-21/10 20/49-21/20 60/49-21/10 20/49-63/10 20/49-21/30 20/49-21/50 20/49-21/70