Add 28/35 and 28/90
28/35 + 28/90 is 10/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
28/35 = 28 × 18/35 × 18 = 504/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
28/90 = 28 × 7/90 × 7 = 196/630 - Add the two like fractions:
504/630 + 196/630 = 504 + 196/630 = 700/630 - 700/630 simplified gives 10/9
- So, 28/35 + 28/90 = 10/9
In mixed form: 11/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/35+28/90 28/35+56/90 28/70+28/90 84/35+28/90 28/35+84/90