Add 18/15 and 10/20
1st number: 1 3/15, 2nd number: 10/20
18/15 + 10/20 is 17/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
18/15 = 18 × 4/15 × 4 = 72/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
10/20 = 10 × 3/20 × 3 = 30/60 - Add the two like fractions:
72/60 + 30/60 = 72 + 30/60 = 102/60 - 102/60 simplified gives 17/10
- So, 18/15 + 10/20 = 17/10
In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15+10/20 18/30+10/20 18/15+10/40 54/15+10/20 18/15+30/20 18/45+10/20 18/15+10/60 90/15+10/20 18/15+50/20 18/75+10/20 18/15+70/20