Add 20/18 and 10/90
1st number: 1 2/18, 2nd number: 10/90
20/18 + 10/90 is 11/9.
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,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
10/90 = 10 × 1/90 × 1 = 10/90 - Add the two like fractions:
100/90 + 10/90 = 100 + 10/90 = 110/90 - 110/90 simplified gives 11/9
- So, 20/18 + 10/90 = 11/9
In mixed form: 12/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18+10/90 20/18+20/90 20/36+10/90 60/18+10/90 20/18+30/90 20/54+10/90 20/18+50/90 20/90+10/90 20/18+70/90