Add 21/36 and 42/98
21/36 + 42/98 is 85/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 98 is 1764
Next, find the equivalent fraction of both fractional numbers with denominator 1764 - For the 1st fraction, since 36 × 49 = 1764,
21/36 = 21 × 49/36 × 49 = 1029/1764 - Likewise, for the 2nd fraction, since 98 × 18 = 1764,
42/98 = 42 × 18/98 × 18 = 756/1764 - Add the two like fractions:
1029/1764 + 756/1764 = 1029 + 756/1764 = 1785/1764 - 1785/1764 simplified gives 85/84
- So, 21/36 + 42/98 = 85/84
In mixed form: 11/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+42/98 21/36+84/98 21/72+42/98 63/36+42/98