Add 15/8 and 9/18
1st number: 1 7/8, 2nd number: 9/18
15/8 + 9/18 is 19/8.
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,
15/8 = 15 × 9/8 × 9 = 135/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
9/18 = 9 × 4/18 × 4 = 36/72 - Add the two like fractions:
135/72 + 36/72 = 135 + 36/72 = 171/72 - 171/72 simplified gives 19/8
- So, 15/8 + 9/18 = 19/8
In mixed form: 23/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/8+9/18 15/16+9/18 15/8+9/36 45/8+9/18 15/8+27/18 15/24+9/18 15/8+9/54 75/8+9/18 15/8+45/18 15/40+9/18 15/8+9/90 15/8+63/18 15/56+9/18