Add 18/60 and 15/20
18/60 + 15/20 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
18/60 = 18 × 1/60 × 1 = 18/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
15/20 = 15 × 3/20 × 3 = 45/60 - Add the two like fractions:
18/60 + 45/60 = 18 + 45/60 = 63/60 - 63/60 simplified gives 21/20
- So, 18/60 + 15/20 = 21/20
In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/60+15/20 18/60+30/20 18/60+15/40 54/60+15/20 18/60+45/20 18/60+15/60 90/60+15/20 18/60+75/20