Add 90/18 and 12/8
1st number: 5 0/18, 2nd number: 1 4/8
90/18 + 12/8 is 13/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
90/18 = 90 × 4/18 × 4 = 360/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
12/8 = 12 × 9/8 × 9 = 108/72 - Add the two like fractions:
360/72 + 108/72 = 360 + 108/72 = 468/72 - 468/72 simplified gives 13/2
- So, 90/18 + 12/8 = 13/2
In mixed form: 61/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+24/8 90/36+12/8 90/18+12/16 90/18+36/8 90/54+12/8 90/18+12/24 90/18+60/8 90/18+12/40 90/18+84/8 90/18+12/56