Add 30/9 and 12/72
1st number: 3 3/9, 2nd number: 12/72
30/9 + 12/72 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 72 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 72 × 1 = 72,
12/72 = 12 × 1/72 × 1 = 12/72 - Add the two like fractions:
240/72 + 12/72 = 240 + 12/72 = 252/72 - 252/72 simplified gives 7/2
- So, 30/9 + 12/72 = 7/2
In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/9+12/72 30/9+24/72 30/18+12/72 90/9+12/72 30/9+36/72 30/27+12/72 30/9+60/72 30/45+12/72 30/9+84/72 30/63+12/72