Add 63/80 and 21/9
1st number: 63/80, 2nd number: 2 3/9
63/80 + 21/9 is 749/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
63/80 = 63 × 9/80 × 9 = 567/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
21/9 = 21 × 80/9 × 80 = 1680/720 - Add the two like fractions:
567/720 + 1680/720 = 567 + 1680/720 = 2247/720 - 2247/720 simplified gives 749/240
- So, 63/80 + 21/9 = 749/240
In mixed form: 329/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/80+42/9 63/80+21/18 63/80+63/9 63/80+21/27 63/80+21/45 63/80+21/63