Add 12/81 and 21/49
12/81 + 21/49 is 109/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 49 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 81 × 49 = 3969,
12/81 = 12 × 49/81 × 49 = 588/3969 - Likewise, for the 2nd fraction, since 49 × 81 = 3969,
21/49 = 21 × 81/49 × 81 = 1701/3969 - Add the two like fractions:
588/3969 + 1701/3969 = 588 + 1701/3969 = 2289/3969 - 2289/3969 simplified gives 109/189
- So, 12/81 + 21/49 = 109/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/81+21/49 12/81+42/49 12/81+21/98 36/81+21/49 12/81+63/49 60/81+21/49 84/81+21/49