Add 30/21 and 49/30
1st number: 1 9/21, 2nd number: 1 19/30
30/21 + 49/30 is 643/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
30/21 = 30 × 10/21 × 10 = 300/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
49/30 = 49 × 7/30 × 7 = 343/210 - Add the two like fractions:
300/210 + 343/210 = 300 + 343/210 = 643/210 - So, 30/21 + 49/30 = 643/210
In mixed form: 313/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+49/30 30/21+98/30 30/42+49/30 30/21+49/60 90/21+49/30 30/63+49/30 30/21+49/90