Add 21/2 and 80/7
1st number: 10 1/2, 2nd number: 11 3/7
21/2 + 80/7 is 307/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 2 × 7 = 14,
21/2 = 21 × 7/2 × 7 = 147/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
80/7 = 80 × 2/7 × 2 = 160/14 - Add the two like fractions:
147/14 + 160/14 = 147 + 160/14 = 307/14 - So, 21/2 + 80/7 = 307/14
In mixed form: 2113/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2+80/7 21/4+80/7 21/2+80/14 63/2+80/7 21/6+80/7 21/2+80/21 21/10+80/7 21/2+80/35 21/14+80/7 21/2+80/49