Add 8/21 and 9/14
8/21 + 9/14 is 43/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
8/21 = 8 × 2/21 × 2 = 16/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
9/14 = 9 × 3/14 × 3 = 27/42 - Add the two like fractions:
16/42 + 27/42 = 16 + 27/42 = 43/42 - So, 8/21 + 9/14 = 43/42
In mixed form: 11/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21+9/14 8/21+18/14 8/42+9/14 8/21+9/28 24/21+9/14 8/21+27/14 8/63+9/14 8/21+9/42 40/21+9/14 8/21+45/14 8/21+9/70 56/21+9/14 8/21+63/14 8/21+9/98