Add 10/15 and 5/20
10/15 + 5/20 is 11/12.
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,
10/15 = 10 × 4/15 × 4 = 40/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
5/20 = 5 × 3/20 × 3 = 15/60 - Add the two like fractions:
40/60 + 15/60 = 40 + 15/60 = 55/60 - 55/60 simplified gives 11/12
- So, 10/15 + 5/20 = 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/15+5/20 10/15+10/20 10/30+5/20 10/15+5/40 30/15+5/20 10/15+15/20 10/45+5/20 10/15+5/60 50/15+5/20 10/15+25/20 10/75+5/20 70/15+5/20 10/15+35/20