Add 30/21 and 49/90
1st number: 1 9/21, 2nd number: 49/90
30/21 + 49/90 is 1243/630.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
30/21 = 30 × 30/21 × 30 = 900/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
49/90 = 49 × 7/90 × 7 = 343/630 - Add the two like fractions:
900/630 + 343/630 = 900 + 343/630 = 1243/630 - So, 30/21 + 49/90 = 1243/630
In mixed form: 1613/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+49/90 30/21+98/90 30/42+49/90 90/21+49/90 30/63+49/90