Add 90/15 and 81/8
1st number: 6 0/15, 2nd number: 10 1/8
90/15 + 81/8 is 129/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
90/15 = 90 × 8/15 × 8 = 720/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
81/8 = 81 × 15/8 × 15 = 1215/120 - Add the two like fractions:
720/120 + 1215/120 = 720 + 1215/120 = 1935/120 - 1935/120 simplified gives 129/8
- So, 90/15 + 81/8 = 129/8
In mixed form: 161/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+81/8 90/15+81/16 90/45+81/8 90/15+81/24 90/75+81/8 90/15+81/40 90/15+81/56