Add 4/21 and 1/12
4/21 + 1/12 is 23/84.
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,
4/21 = 4 × 4/21 × 4 = 16/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
1/12 = 1 × 7/12 × 7 = 7/84 - Add the two like fractions:
16/84 + 7/84 = 16 + 7/84 = 23/84 - So, 4/21 + 1/12 = 23/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+1/12 4/21+2/12 4/42+1/12 4/21+1/24 12/21+1/12 4/21+3/12 4/63+1/12 4/21+1/36 20/21+1/12 4/21+5/12 4/21+1/60 28/21+1/12 4/21+7/12 4/21+1/84