Add 9/8 and 81/15
1st number: 1 1/8, 2nd number: 5 6/15
9/8 + 81/15 is 261/40.
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,
9/8 = 9 × 15/8 × 15 = 135/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
81/15 = 81 × 8/15 × 8 = 648/120 - Add the two like fractions:
135/120 + 648/120 = 135 + 648/120 = 783/120 - 783/120 simplified gives 261/40
- So, 9/8 + 81/15 = 261/40
In mixed form: 621/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/8+81/15 9/16+81/15 9/8+81/30 27/8+81/15 9/24+81/15 9/8+81/45 45/8+81/15 9/40+81/15 9/8+81/75 63/8+81/15 9/56+81/15