Add 81/12 and 80/5
1st number: 6 9/12, 2nd number: 16 0/5
81/12 + 80/5 is 91/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Likewise, for the 2nd fraction, since 5 × 12 = 60,
80/5 = 80 × 12/5 × 12 = 960/60 - Add the two like fractions:
405/60 + 960/60 = 405 + 960/60 = 1365/60 - 1365/60 simplified gives 91/4
- So, 81/12 + 80/5 = 91/4
In mixed form: 223/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/24+80/5 81/12+80/10 81/36+80/5 81/12+80/15 81/60+80/5 81/12+80/25 81/84+80/5 81/12+80/35