Add 30/21 and 63/9
1st number: 1 9/21, 2nd number: 7 0/9
30/21 + 63/9 is 59/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
30/21 = 30 × 3/21 × 3 = 90/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
63/9 = 63 × 7/9 × 7 = 441/63 - Add the two like fractions:
90/63 + 441/63 = 90 + 441/63 = 531/63 - 531/63 simplified gives 59/7
- So, 30/21 + 63/9 = 59/7
In mixed form: 83/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+63/9 30/42+63/9 30/21+63/18 90/21+63/9 30/63+63/9 30/21+63/27 30/21+63/45