Add 4/5 and 18/81
4/5 + 18/81 is 46/45.
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,
4/5 = 4 × 81/5 × 81 = 324/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
18/81 = 18 × 5/81 × 5 = 90/405 - Add the two like fractions:
324/405 + 90/405 = 324 + 90/405 = 414/405 - 414/405 simplified gives 46/45
- So, 4/5 + 18/81 = 46/45
In mixed form: 11/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/5+18/81 4/5+36/81 4/10+18/81 12/5+18/81 4/5+54/81 4/15+18/81 20/5+18/81 4/5+90/81 4/25+18/81 28/5+18/81 4/35+18/81