Add 12/9 and 21/60
1st number: 1 3/9, 2nd number: 21/60
12/9 + 21/60 is 101/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 60 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
12/9 = 12 × 20/9 × 20 = 240/180 - Likewise, for the 2nd fraction, since 60 × 3 = 180,
21/60 = 21 × 3/60 × 3 = 63/180 - Add the two like fractions:
240/180 + 63/180 = 240 + 63/180 = 303/180 - 303/180 simplified gives 101/60
- So, 12/9 + 21/60 = 101/60
In mixed form: 141/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9+21/60 12/9+42/60 12/18+21/60 36/9+21/60 12/9+63/60 12/27+21/60 60/9+21/60 12/45+21/60 84/9+21/60 12/63+21/60