Add 28/9 and 90/8
1st number: 3 1/9, 2nd number: 11 2/8
28/9 + 90/8 is 517/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
28/9 = 28 × 8/9 × 8 = 224/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
90/8 = 90 × 9/8 × 9 = 810/72 - Add the two like fractions:
224/72 + 810/72 = 224 + 810/72 = 1034/72 - 1034/72 simplified gives 517/36
- So, 28/9 + 90/8 = 517/36
In mixed form: 1413/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/9+90/8 28/18+90/8 28/9+90/16 84/9+90/8 28/27+90/8 28/9+90/24 28/45+90/8 28/9+90/40 28/63+90/8 28/9+90/56