Add 4/8 and 18/81
4/8 + 18/81 is 13/18.
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,
4/8 = 4 × 81/8 × 81 = 324/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
18/81 = 18 × 8/81 × 8 = 144/648 - Add the two like fractions:
324/648 + 144/648 = 324 + 144/648 = 468/648 - 468/648 simplified gives 13/18
- So, 4/8 + 18/81 = 13/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8+36/81 4/16+18/81 12/8+18/81 4/8+54/81 4/24+18/81 20/8+18/81 4/8+90/81 4/40+18/81 28/8+18/81 4/56+18/81