Add 32/21 and 12/9
1st number: 1 11/21, 2nd number: 1 3/9
32/21 + 12/9 is 20/7.
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,
32/21 = 32 × 3/21 × 3 = 96/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
12/9 = 12 × 7/9 × 7 = 84/63 - Add the two like fractions:
96/63 + 84/63 = 96 + 84/63 = 180/63 - 180/63 simplified gives 20/7
- So, 32/21 + 12/9 = 20/7
In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 64/21+12/9 32/21+24/9 32/42+12/9 32/21+12/18 96/21+12/9 32/21+36/9 32/63+12/9 32/21+12/27 32/21+60/9 32/21+12/45 32/21+84/9 32/21+12/63