Add 6/8 and 81/18
1st number: 6/8, 2nd number: 4 9/18
6/8 + 81/18 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
6/8 = 6 × 9/8 × 9 = 54/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
81/18 = 81 × 4/18 × 4 = 324/72 - Add the two like fractions:
54/72 + 324/72 = 54 + 324/72 = 378/72 - 378/72 simplified gives 21/4
- So, 6/8 + 81/18 = 21/4
In mixed form: 51/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/8+81/18 6/16+81/18 6/8+81/36 18/8+81/18 6/24+81/18 6/8+81/54 30/8+81/18 6/40+81/18 6/8+81/90 42/8+81/18 6/56+81/18