Add 9/21 and 1/12
9/21 + 1/12 is 43/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
9/21 = 9 × 4/21 × 4 = 36/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
1/12 = 1 × 7/12 × 7 = 7/84 - Add the two like fractions:
36/84 + 7/84 = 36 + 7/84 = 43/84 - So, 9/21 + 1/12 = 43/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+1/12 9/21+2/12 9/42+1/12 9/21+1/24 27/21+1/12 9/21+3/12 9/63+1/12 9/21+1/36 45/21+1/12 9/21+5/12 9/21+1/60 63/21+1/12 9/21+7/12 9/21+1/84