Add 80/15 and 70/8
1st number: 5 5/15, 2nd number: 8 6/8
80/15 + 70/8 is 169/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
80/15 = 80 × 8/15 × 8 = 640/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
70/8 = 70 × 15/8 × 15 = 1050/120 - Add the two like fractions:
640/120 + 1050/120 = 640 + 1050/120 = 1690/120 - 1690/120 simplified gives 169/12
- So, 80/15 + 70/8 = 169/12
In mixed form: 141/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30+70/8 80/15+70/16 80/45+70/8 80/15+70/24 80/75+70/8 80/15+70/40 80/15+70/56