Add 90/3 and 15/12
1st number: 30 0/3, 2nd number: 1 3/12
90/3 + 15/12 is 125/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
90/3 = 90 × 4/3 × 4 = 360/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
15/12 = 15 × 1/12 × 1 = 15/12 - Add the two like fractions:
360/12 + 15/12 = 360 + 15/12 = 375/12 - 375/12 simplified gives 125/4
- So, 90/3 + 15/12 = 125/4
In mixed form: 311/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3+30/12 90/6+15/12 90/3+15/24 90/3+45/12 90/9+15/12 90/3+15/36 90/3+75/12 90/15+15/12 90/3+15/60 90/21+15/12 90/3+15/84