Add 30/9 and 12/7
1st number: 3 3/9, 2nd number: 1 5/7
30/9 + 12/7 is 106/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
30/9 = 30 × 7/9 × 7 = 210/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
12/7 = 12 × 9/7 × 9 = 108/63 - Add the two like fractions:
210/63 + 108/63 = 210 + 108/63 = 318/63 - 318/63 simplified gives 106/21
- So, 30/9 + 12/7 = 106/21
In mixed form: 51/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/9+12/7 30/9+24/7 30/18+12/7 30/9+12/14 90/9+12/7 30/9+36/7 30/27+12/7 30/9+12/21 30/9+60/7 30/45+12/7 30/9+12/35 30/9+84/7 30/63+12/7 30/9+12/49