Add 21/45 and 14/81
21/45 + 14/81 is 259/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
21/45 = 21 × 9/45 × 9 = 189/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
14/81 = 14 × 5/81 × 5 = 70/405 - Add the two like fractions:
189/405 + 70/405 = 189 + 70/405 = 259/405 - So, 21/45 + 14/81 = 259/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+14/81 21/45+28/81 21/90+14/81 63/45+14/81 21/45+42/81 21/45+70/81 21/45+98/81