Add 20/15 and 81/60
1st number: 1 5/15, 2nd number: 1 21/60
20/15 + 81/60 is 161/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
20/15 = 20 × 4/15 × 4 = 80/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
81/60 = 81 × 1/60 × 1 = 81/60 - Add the two like fractions:
80/60 + 81/60 = 80 + 81/60 = 161/60 - So, 20/15 + 81/60 = 161/60
In mixed form: 241/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15+81/60 20/30+81/60 60/15+81/60 20/45+81/60 20/75+81/60