Add 15/18 and 10/20
15/18 + 10/20 is 4/3.
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,
15/18 = 15 × 10/18 × 10 = 150/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
10/20 = 10 × 9/20 × 9 = 90/180 - Add the two like fractions:
150/180 + 90/180 = 150 + 90/180 = 240/180 - 240/180 simplified gives 4/3
- So, 15/18 + 10/20 = 4/3
In mixed form: 11/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+10/20 15/36+10/20 15/18+10/40 45/18+10/20 15/18+30/20 15/54+10/20 15/18+10/60 75/18+10/20 15/18+50/20 15/90+10/20 15/18+70/20