Add 28/42 and 49/90
28/42 + 49/90 is 109/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
28/42 = 28 × 15/42 × 15 = 420/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
49/90 = 49 × 7/90 × 7 = 343/630 - Add the two like fractions:
420/630 + 343/630 = 420 + 343/630 = 763/630 - 763/630 simplified gives 109/90
- So, 28/42 + 49/90 = 109/90
In mixed form: 119/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+49/90 28/42+98/90 28/84+49/90 84/42+49/90