Add 8/5 and 42/81
1st number: 1 3/5, 2nd number: 42/81
8/5 + 42/81 is 286/135.
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,
8/5 = 8 × 81/5 × 81 = 648/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
42/81 = 42 × 5/81 × 5 = 210/405 - Add the two like fractions:
648/405 + 210/405 = 648 + 210/405 = 858/405 - 858/405 simplified gives 286/135
- So, 8/5 + 42/81 = 286/135
In mixed form: 216/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5+42/81 8/5+84/81 8/10+42/81 24/5+42/81 8/15+42/81 40/5+42/81 8/25+42/81 56/5+42/81 8/35+42/81