Add 45/18 and 90/5
1st number: 2 9/18, 2nd number: 18 0/5
45/18 + 90/5 is 41/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
45/18 = 45 × 5/18 × 5 = 225/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
90/5 = 90 × 18/5 × 18 = 1620/90 - Add the two like fractions:
225/90 + 1620/90 = 225 + 1620/90 = 1845/90 - 1845/90 simplified gives 41/2
- So, 45/18 + 90/5 = 41/2
In mixed form: 201/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+90/5 45/36+90/5 45/18+90/10 45/54+90/5 45/18+90/15 45/90+90/5 45/18+90/25 45/18+90/35