Add 15/7 and 81/80
1st number: 2 1/7, 2nd number: 1 1/80
15/7 + 81/80 is 1767/560.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
15/7 = 15 × 80/7 × 80 = 1200/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
81/80 = 81 × 7/80 × 7 = 567/560 - Add the two like fractions:
1200/560 + 567/560 = 1200 + 567/560 = 1767/560 - So, 15/7 + 81/80 = 1767/560
In mixed form: 387/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7+81/80 15/14+81/80 45/7+81/80 15/21+81/80 75/7+81/80 15/35+81/80 15/49+81/80