Add 9/18 and 40/90
9/18 + 40/90 is 17/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
9/18 = 9 × 5/18 × 5 = 45/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
40/90 = 40 × 1/90 × 1 = 40/90 - Add the two like fractions:
45/90 + 40/90 = 45 + 40/90 = 85/90 - 85/90 simplified gives 17/18
- So, 9/18 + 40/90 = 17/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 9/18+80/90 9/36+40/90 27/18+40/90 9/54+40/90 45/18+40/90 9/90+40/90 63/18+40/90