Add 80/12 and 90/28
1st number: 6 8/12, 2nd number: 3 6/28
80/12 + 90/28 is 415/42.
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,
80/12 = 80 × 7/12 × 7 = 560/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
90/28 = 90 × 3/28 × 3 = 270/84 - Add the two like fractions:
560/84 + 270/84 = 560 + 270/84 = 830/84 - 830/84 simplified gives 415/42
- So, 80/12 + 90/28 = 415/42
In mixed form: 937/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/24+90/28 80/12+90/56 80/36+90/28 80/12+90/84 80/60+90/28 80/84+90/28