Subtract 9/49 from 81/20
1st number: 4 1/20, 2nd number: 9/49
81/20 - 9/49 is 3789/980.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 49 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
81/20 = 81 × 49/20 × 49 = 3969/980 - Likewise, for the 2nd fraction, since 49 × 20 = 980,
9/49 = 9 × 20/49 × 20 = 180/980 - Subtract the two like fractions:
3969/980 - 180/980 = 3969 - 180/980 = 3789/980 - In mixed form: 3849/980
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20-18/49 81/40-9/49 81/20-9/98 81/20-27/49 81/60-9/49 81/20-45/49 81/20-63/49