Add 15/12 and 30/72
1st number: 1 3/12, 2nd number: 30/72
15/12 + 30/72 is 5/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 72 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 12 × 6 = 72,
15/12 = 15 × 6/12 × 6 = 90/72 - Likewise, for the 2nd fraction, since 72 × 1 = 72,
30/72 = 30 × 1/72 × 1 = 30/72 - Add the two like fractions:
90/72 + 30/72 = 90 + 30/72 = 120/72 - 120/72 simplified gives 5/3
- So, 15/12 + 30/72 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+30/72 15/12+60/72 15/24+30/72 45/12+30/72 15/12+90/72 15/36+30/72 75/12+30/72 15/60+30/72 15/84+30/72