Add 2/21 and 21/54
2/21 + 21/54 is 61/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 54 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 21 × 18 = 378,
2/21 = 2 × 18/21 × 18 = 36/378 - Likewise, for the 2nd fraction, since 54 × 7 = 378,
21/54 = 21 × 7/54 × 7 = 147/378 - Add the two like fractions:
36/378 + 147/378 = 36 + 147/378 = 183/378 - 183/378 simplified gives 61/126
- So, 2/21 + 21/54 = 61/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+21/54 2/21+42/54 2/42+21/54 6/21+21/54 2/21+63/54 2/63+21/54 10/21+21/54 14/21+21/54