Add 28/12 and 90/35
1st number: 2 4/12, 2nd number: 2 20/35
28/12 + 90/35 is 103/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
28/12 = 28 × 35/12 × 35 = 980/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
90/35 = 90 × 12/35 × 12 = 1080/420 - Add the two like fractions:
980/420 + 1080/420 = 980 + 1080/420 = 2060/420 - 2060/420 simplified gives 103/21
- So, 28/12 + 90/35 = 103/21
In mixed form: 419/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12+90/35 28/24+90/35 28/12+90/70 84/12+90/35 28/36+90/35 28/60+90/35 28/84+90/35