Add 12/27 and 21/49
12/27 + 21/49 is 55/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 49 is 1323
Next, find the equivalent fraction of both fractional numbers with denominator 1323 - For the 1st fraction, since 27 × 49 = 1323,
12/27 = 12 × 49/27 × 49 = 588/1323 - Likewise, for the 2nd fraction, since 49 × 27 = 1323,
21/49 = 21 × 27/49 × 27 = 567/1323 - Add the two like fractions:
588/1323 + 567/1323 = 588 + 567/1323 = 1155/1323 - 1155/1323 simplified gives 55/63
- So, 12/27 + 21/49 = 55/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/27+21/49 12/27+42/49 12/54+21/49 12/27+21/98 36/27+21/49 12/27+63/49 12/81+21/49 60/27+21/49 84/27+21/49