Subtract 9/21 from 12/98
12/98 - 9/21 is -15/49.
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,
12/98 = 12 × 3/98 × 3 = 36/294 - Likewise, for the 2nd fraction, since 21 × 14 = 294,
9/21 = 9 × 14/21 × 14 = 126/294 - Subtract the two like fractions:
36/294 - 126/294 = 36 - 126/294 = -90/294 - After reducing the fraction, the answer is -15/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/98-9/21 12/98-18/21 12/98-9/42 36/98-9/21 12/98-27/21 12/98-9/63 60/98-9/21 12/98-45/21 84/98-9/21 12/98-63/21