Subtract 21/18 from 84/98
1st number: 84/98, 2nd number: 1 3/18
84/98 - 21/18 is -13/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 18 is 882
Next, find the equivalent fraction of both fractional numbers with denominator 882 - For the 1st fraction, since 98 × 9 = 882,
84/98 = 84 × 9/98 × 9 = 756/882 - Likewise, for the 2nd fraction, since 18 × 49 = 882,
21/18 = 21 × 49/18 × 49 = 1029/882 - Subtract the two like fractions:
756/882 - 1029/882 = 756 - 1029/882 = -273/882 - After reducing the fraction, the answer is -13/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/98-42/18 84/98-21/36 84/98-63/18 84/98-21/54 84/98-21/90