Add 5/8 and 35/81
5/8 + 35/81 is 685/648.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
5/8 = 5 × 81/8 × 81 = 405/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
35/81 = 35 × 8/81 × 8 = 280/648 - Add the two like fractions:
405/648 + 280/648 = 405 + 280/648 = 685/648 - So, 5/8 + 35/81 = 685/648
In mixed form: 137/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/8+35/81 5/8+70/81 5/16+35/81 15/8+35/81 5/24+35/81 25/8+35/81 5/40+35/81 35/8+35/81 5/56+35/81