Add 18/8 and 81/15
1st number: 2 2/8, 2nd number: 5 6/15
18/8 + 81/15 is 153/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
18/8 = 18 × 15/8 × 15 = 270/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
81/15 = 81 × 8/15 × 8 = 648/120 - Add the two like fractions:
270/120 + 648/120 = 270 + 648/120 = 918/120 - 918/120 simplified gives 153/20
- So, 18/8 + 81/15 = 153/20
In mixed form: 713/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8+81/15 18/16+81/15 18/8+81/30 54/8+81/15 18/24+81/15 18/8+81/45 90/8+81/15 18/40+81/15 18/8+81/75 18/56+81/15