Add 90/12 and 42/27
1st number: 7 6/12, 2nd number: 1 15/27
90/12 + 42/27 is 163/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 12 × 9 = 108,
90/12 = 90 × 9/12 × 9 = 810/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
42/27 = 42 × 4/27 × 4 = 168/108 - Add the two like fractions:
810/108 + 168/108 = 810 + 168/108 = 978/108 - 978/108 simplified gives 163/18
- So, 90/12 + 42/27 = 163/18
In mixed form: 91/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+84/27 90/24+42/27 90/12+42/54 90/36+42/27 90/12+42/81 90/60+42/27 90/84+42/27