Add 21/12 and 27/60
1st number: 1 9/12, 2nd number: 27/60
21/12 + 27/60 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
27/60 = 27 × 1/60 × 1 = 27/60 - Add the two like fractions:
105/60 + 27/60 = 105 + 27/60 = 132/60 - 132/60 simplified gives 11/5
- So, 21/12 + 27/60 = 11/5
In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+27/60 21/12+54/60 21/24+27/60 63/12+27/60 21/12+81/60 21/36+27/60 21/60+27/60 21/84+27/60