Subtract 4/21 from 49/20
1st number: 2 9/20, 2nd number: 4/21
49/20 - 4/21 is 949/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
49/20 = 49 × 21/20 × 21 = 1029/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
4/21 = 4 × 20/21 × 20 = 80/420 - Subtract the two like fractions:
1029/420 - 80/420 = 1029 - 80/420 = 949/420 - In mixed form: 2109/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/20-4/21 49/20-8/21 49/40-4/21 49/20-4/42 49/20-12/21 49/60-4/21 49/20-4/63 49/20-20/21 49/20-28/21