Add 81/12 and 24/15
1st number: 6 9/12, 2nd number: 1 9/15
81/12 + 24/15 is 167/20.
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,
81/12 = 81 × 5/12 × 5 = 405/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
24/15 = 24 × 4/15 × 4 = 96/60 - Add the two like fractions:
405/60 + 96/60 = 405 + 96/60 = 501/60 - 501/60 simplified gives 167/20
- So, 81/12 + 24/15 = 167/20
In mixed form: 87/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/12+48/15 81/24+24/15 81/12+24/30 81/12+72/15 81/36+24/15 81/12+24/45 81/60+24/15 81/12+24/75 81/84+24/15