Add 90/12 and 7/15
1st number: 7 6/12, 2nd number: 7/15
90/12 + 7/15 is 239/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
7/15 = 7 × 4/15 × 4 = 28/60 - Add the two like fractions:
450/60 + 28/60 = 450 + 28/60 = 478/60 - 478/60 simplified gives 239/30
- So, 90/12 + 7/15 = 239/30
In mixed form: 729/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+14/15 90/24+7/15 90/12+7/30 90/12+21/15 90/36+7/15 90/12+7/45 90/12+35/15 90/60+7/15 90/12+7/75 90/12+49/15 90/84+7/15