Add 21/60 and 16/18
21/60 + 16/18 is 223/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
21/60 = 21 × 3/60 × 3 = 63/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
16/18 = 16 × 10/18 × 10 = 160/180 - Add the two like fractions:
63/180 + 160/180 = 63 + 160/180 = 223/180 - So, 21/60 + 16/18 = 223/180
In mixed form: 143/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+16/18 21/60+32/18 21/60+16/36 63/60+16/18 21/60+48/18 21/60+16/54 21/60+80/18 21/60+16/90