Add 21/98 and 54/21
1st number: 21/98, 2nd number: 2 12/21
21/98 + 54/21 is 39/14.
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,
54/21 = 54 × 14/21 × 14 = 756/294 - Add the two like fractions:
63/294 + 756/294 = 63 + 756/294 = 819/294 - 819/294 simplified gives 39/14
- So, 21/98 + 54/21 = 39/14
In mixed form: 211/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98+54/21 21/98+54/42 63/98+54/21 21/98+54/63