Add 6/21 and 72/9
1st number: 6/21, 2nd number: 8 0/9
6/21 + 72/9 is 58/7.
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,
6/21 = 6 × 3/21 × 3 = 18/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
72/9 = 72 × 7/9 × 7 = 504/63 - Add the two like fractions:
18/63 + 504/63 = 18 + 504/63 = 522/63 - 522/63 simplified gives 58/7
- So, 6/21 + 72/9 = 58/7
In mixed form: 82/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+72/9 6/42+72/9 6/21+72/18 18/21+72/9 6/63+72/9 6/21+72/27 30/21+72/9 6/21+72/45 42/21+72/9 6/21+72/63