Add 84/98 and 12/21
84/98 + 12/21 is 10/7.
Steps for adding 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,
84/98 = 84 × 3/98 × 3 = 252/294 - Likewise, for the 2nd fraction, since 21 × 14 = 294,
12/21 = 12 × 14/21 × 14 = 168/294 - Add the two like fractions:
252/294 + 168/294 = 252 + 168/294 = 420/294 - 420/294 simplified gives 10/7
- So, 84/98 + 12/21 = 10/7
In mixed form: 13/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/98+24/21 84/98+12/42 84/98+36/21 84/98+12/63 84/98+60/21 84/98+84/21