Add 80/15 and 70/12
1st number: 5 5/15, 2nd number: 5 10/12
80/15 + 70/12 is 67/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
80/15 = 80 × 4/15 × 4 = 320/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
70/12 = 70 × 5/12 × 5 = 350/60 - Add the two like fractions:
320/60 + 350/60 = 320 + 350/60 = 670/60 - 670/60 simplified gives 67/6
- So, 80/15 + 70/12 = 67/6
In mixed form: 111/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30+70/12 80/15+70/24 80/45+70/12 80/15+70/36 80/75+70/12 80/15+70/60 80/15+70/84