Add 90/15 and 90/8
1st number: 6 0/15, 2nd number: 11 2/8
90/15 + 90/8 is 69/4.
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,
90/8 = 90 × 15/8 × 15 = 1350/120 - Add the two like fractions:
720/120 + 1350/120 = 720 + 1350/120 = 2070/120 - 2070/120 simplified gives 69/4
- So, 90/15 + 90/8 = 69/4
In mixed form: 171/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+90/8 90/15+90/16 90/45+90/8 90/15+90/24 90/75+90/8 90/15+90/40 90/15+90/56