Add 4/18 and 45/90
4/18 + 45/90 is 13/18.
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,
4/18 = 4 × 5/18 × 5 = 20/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
45/90 = 45 × 1/90 × 1 = 45/90 - Add the two like fractions:
20/90 + 45/90 = 20 + 45/90 = 65/90 - 65/90 simplified gives 13/18
- So, 4/18 + 45/90 = 13/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18+45/90 4/36+45/90 12/18+45/90 4/54+45/90 20/18+45/90 4/90+45/90 28/18+45/90