Subtract 81/98 from 18/5
1st number: 3 3/5, 2nd number: 81/98
18/5 - 81/98 is 1359/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 98 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 5 × 98 = 490,
18/5 = 18 × 98/5 × 98 = 1764/490 - Likewise, for the 2nd fraction, since 98 × 5 = 490,
81/98 = 81 × 5/98 × 5 = 405/490 - Subtract the two like fractions:
1764/490 - 405/490 = 1764 - 405/490 = 1359/490 - In mixed form: 2379/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5-81/98 18/10-81/98 54/5-81/98 18/15-81/98 90/5-81/98 18/25-81/98 18/35-81/98