Add 21/98 and 18/21
21/98 + 18/21 is 15/14.
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,
21/98 = 21 × 3/98 × 3 = 63/294 - Likewise, for the 2nd fraction, since 21 × 14 = 294,
18/21 = 18 × 14/21 × 14 = 252/294 - Add the two like fractions:
63/294 + 252/294 = 63 + 252/294 = 315/294 - 315/294 simplified gives 15/14
- So, 21/98 + 18/21 = 15/14
In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+18/21 21/98+36/21 21/98+18/42 63/98+18/21 21/98+54/21 21/98+18/63 21/98+90/21