Add 90/30 and 81/8
1st number: 3 0/30, 2nd number: 10 1/8
90/30 + 81/8 is 105/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
90/30 = 90 × 4/30 × 4 = 360/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
81/8 = 81 × 15/8 × 15 = 1215/120 - Add the two like fractions:
360/120 + 1215/120 = 360 + 1215/120 = 1575/120 - 1575/120 simplified gives 105/8
- So, 90/30 + 81/8 = 105/8
In mixed form: 131/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/60+81/8 90/30+81/16 90/30+81/24 90/30+81/40 90/30+81/56