Add 15/20 and 10/18
15/20 + 10/18 is 47/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
15/20 = 15 × 9/20 × 9 = 135/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
10/18 = 10 × 10/18 × 10 = 100/180 - Add the two like fractions:
135/180 + 100/180 = 135 + 100/180 = 235/180 - 235/180 simplified gives 47/36
- So, 15/20 + 10/18 = 47/36
In mixed form: 111/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/20+10/18 15/20+20/18 15/40+10/18 15/20+10/36 45/20+10/18 15/20+30/18 15/60+10/18 15/20+10/54 75/20+10/18 15/20+50/18 15/20+10/90 15/20+70/18