Add 18/20 and 9/60
18/20 + 9/60 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
9/60 = 9 × 1/60 × 1 = 9/60 - Add the two like fractions:
54/60 + 9/60 = 54 + 9/60 = 63/60 - 63/60 simplified gives 21/20
- So, 18/20 + 9/60 = 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: 36/20+9/60 18/20+18/60 18/40+9/60 54/20+9/60 18/20+27/60 18/60+9/60 90/20+9/60 18/20+45/60 18/20+63/60