Add 2/5 and 49/81
2/5 + 49/81 is 407/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
2/5 = 2 × 81/5 × 81 = 162/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
49/81 = 49 × 5/81 × 5 = 245/405 - Add the two like fractions:
162/405 + 245/405 = 162 + 245/405 = 407/405 - So, 2/5 + 49/81 = 407/405
In mixed form: 12/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/5+49/81 2/5+98/81 2/10+49/81 6/5+49/81 2/15+49/81 10/5+49/81 2/25+49/81 14/5+49/81 2/35+49/81