Add 90/18 and 9/8
1st number: 5 0/18, 2nd number: 1 1/8
90/18 + 9/8 is 49/8.
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,
9/8 = 9 × 9/8 × 9 = 81/72 - Add the two like fractions:
360/72 + 81/72 = 360 + 81/72 = 441/72 - 441/72 simplified gives 49/8
- So, 90/18 + 9/8 = 49/8
In mixed form: 61/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+18/8 90/36+9/8 90/18+9/16 90/18+27/8 90/54+9/8 90/18+9/24 90/18+45/8 90/18+9/40 90/18+63/8 90/18+9/56