Add 30/9 and 70/8
1st number: 3 3/9, 2nd number: 8 6/8
30/9 + 70/8 is 145/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
30/9 = 30 × 8/9 × 8 = 240/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
70/8 = 70 × 9/8 × 9 = 630/72 - Add the two like fractions:
240/72 + 630/72 = 240 + 630/72 = 870/72 - 870/72 simplified gives 145/12
- So, 30/9 + 70/8 = 145/12
In mixed form: 121/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/9+70/8 30/18+70/8 30/9+70/16 90/9+70/8 30/27+70/8 30/9+70/24 30/45+70/8 30/9+70/40 30/63+70/8 30/9+70/56