Add 90/12 and 3/15
1st number: 7 6/12, 2nd number: 3/15
90/12 + 3/15 is 77/10.
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,
3/15 = 3 × 4/15 × 4 = 12/60 - Add the two like fractions:
450/60 + 12/60 = 450 + 12/60 = 462/60 - 462/60 simplified gives 77/10
- So, 90/12 + 3/15 = 77/10
In mixed form: 77/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+6/15 90/24+3/15 90/12+3/30 90/12+9/15 90/36+3/15 90/12+3/45 90/60+3/15 90/12+3/75 90/12+21/15 90/84+3/15