Add 21/49 and 2/81
21/49 + 2/81 is 257/567.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 81 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,
21/49 = 21 × 81/49 × 81 = 1701/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
2/81 = 2 × 49/81 × 49 = 98/3969 - Add the two like fractions:
1701/3969 + 98/3969 = 1701 + 98/3969 = 1799/3969 - 1799/3969 simplified gives 257/567
- So, 21/49 + 2/81 = 257/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/49+2/81 21/49+4/81 21/98+2/81 63/49+2/81 21/49+6/81 21/49+10/81 21/49+14/81