Add 90/12 and 81/28
1st number: 7 6/12, 2nd number: 2 25/28
90/12 + 81/28 is 291/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
90/12 = 90 × 7/12 × 7 = 630/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
81/28 = 81 × 3/28 × 3 = 243/84 - Add the two like fractions:
630/84 + 243/84 = 630 + 243/84 = 873/84 - 873/84 simplified gives 291/28
- So, 90/12 + 81/28 = 291/28
In mixed form: 1011/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24+81/28 90/12+81/56 90/36+81/28 90/12+81/84 90/60+81/28 90/84+81/28