Add 84/60 and 21/12
1st number: 1 24/60, 2nd number: 1 9/12
84/60 + 21/12 is 63/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
84/60 = 84 × 1/60 × 1 = 84/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Add the two like fractions:
84/60 + 105/60 = 84 + 105/60 = 189/60 - 189/60 simplified gives 63/20
- So, 84/60 + 21/12 = 63/20
In mixed form: 33/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60+42/12 84/60+21/24 84/60+63/12 84/60+21/36 84/60+21/60 84/60+21/84