Subtract 9/98 from 81/40
1st number: 2 1/40, 2nd number: 9/98
81/40 - 9/98 is 3789/1960.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 98 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
81/40 = 81 × 49/40 × 49 = 3969/1960 - Likewise, for the 2nd fraction, since 98 × 20 = 1960,
9/98 = 9 × 20/98 × 20 = 180/1960 - Subtract the two like fractions:
3969/1960 - 180/1960 = 3969 - 180/1960 = 3789/1960 - In mixed form: 11829/1960
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/40-18/98 81/80-9/98 81/40-27/98 81/40-45/98 81/40-63/98