Add 90/18 and 10/20
1st number: 5 0/18, 2nd number: 10/20
90/18 + 10/20 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
90/18 = 90 × 10/18 × 10 = 900/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
10/20 = 10 × 9/20 × 9 = 90/180 - Add the two like fractions:
900/180 + 90/180 = 900 + 90/180 = 990/180 - 990/180 simplified gives 11/2
- So, 90/18 + 10/20 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36+10/20 90/18+10/40 90/18+30/20 90/54+10/20 90/18+10/60 90/18+50/20 90/18+70/20