Add 9/8 and 18/90
1st number: 1 1/8, 2nd number: 18/90
9/8 + 18/90 is 53/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
9/8 = 9 × 45/8 × 45 = 405/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
18/90 = 18 × 4/90 × 4 = 72/360 - Add the two like fractions:
405/360 + 72/360 = 405 + 72/360 = 477/360 - 477/360 simplified gives 53/40
- So, 9/8 + 18/90 = 53/40
In mixed form: 113/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/8+18/90 9/8+36/90 9/16+18/90 27/8+18/90 9/8+54/90 9/24+18/90 45/8+18/90 9/40+18/90 63/8+18/90 9/56+18/90