Add 90/12 and 7/28
1st number: 7 6/12, 2nd number: 7/28
90/12 + 7/28 is 31/4.
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,
7/28 = 7 × 3/28 × 3 = 21/84 - Add the two like fractions:
630/84 + 21/84 = 630 + 21/84 = 651/84 - 651/84 simplified gives 31/4
- So, 90/12 + 7/28 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+14/28 90/24+7/28 90/12+7/56 90/12+21/28 90/36+7/28 90/12+7/84 90/12+35/28 90/60+7/28 90/12+49/28 90/84+7/28