Add 90/15 and 18/12
1st number: 6 0/15, 2nd number: 1 6/12
90/15 + 18/12 is 15/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
90/15 = 90 × 4/15 × 4 = 360/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
18/12 = 18 × 5/12 × 5 = 90/60 - Add the two like fractions:
360/60 + 90/60 = 360 + 90/60 = 450/60 - 450/60 simplified gives 15/2
- So, 90/15 + 18/12 = 15/2
In mixed form: 71/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/15+36/12 90/30+18/12 90/15+18/24 90/15+54/12 90/45+18/12 90/15+18/36 90/15+90/12 90/75+18/12 90/15+18/60 90/15+18/84