Subtract 18/21 from 30/98
30/98 - 18/21 is -27/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 21 is 294
Next, find the equivalent fraction of both fractional numbers with denominator 294 - For the 1st fraction, since 98 × 3 = 294,
30/98 = 30 × 3/98 × 3 = 90/294 - Likewise, for the 2nd fraction, since 21 × 14 = 294,
18/21 = 18 × 14/21 × 14 = 252/294 - Subtract the two like fractions:
90/294 - 252/294 = 90 - 252/294 = -162/294 - After reducing the fraction, the answer is -27/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/98-18/21 30/98-36/21 30/98-18/42 90/98-18/21 30/98-54/21 30/98-18/63 30/98-90/21