Add 90/12 and 24/15
1st number: 7 6/12, 2nd number: 1 9/15
90/12 + 24/15 is 91/10.
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,
24/15 = 24 × 4/15 × 4 = 96/60 - Add the two like fractions:
450/60 + 96/60 = 450 + 96/60 = 546/60 - 546/60 simplified gives 91/10
- So, 90/12 + 24/15 = 91/10
In mixed form: 91/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+48/15 90/24+24/15 90/12+24/30 90/12+72/15 90/36+24/15 90/12+24/45 90/60+24/15 90/12+24/75 90/84+24/15