Add 90/12 and 6/15
1st number: 7 6/12, 2nd number: 6/15
90/12 + 6/15 is 79/10.
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,
6/15 = 6 × 4/15 × 4 = 24/60 - Add the two like fractions:
450/60 + 24/60 = 450 + 24/60 = 474/60 - 474/60 simplified gives 79/10
- So, 90/12 + 6/15 = 79/10
In mixed form: 79/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+12/15 90/24+6/15 90/12+6/30 90/12+18/15 90/36+6/15 90/12+6/45 90/12+30/15 90/60+6/15 90/12+6/75 90/12+42/15 90/84+6/15