Add 27/10 and 21/12
1st number: 2 7/10, 2nd number: 1 9/12
27/10 + 21/12 is 89/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 10 × 6 = 60,
27/10 = 27 × 6/10 × 6 = 162/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Add the two like fractions:
162/60 + 105/60 = 162 + 105/60 = 267/60 - 267/60 simplified gives 89/20
- So, 27/10 + 21/12 = 89/20
In mixed form: 49/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/10+21/12 27/10+42/12 27/20+21/12 27/10+21/24 81/10+21/12 27/10+63/12 27/30+21/12 27/10+21/36 27/50+21/12 27/10+21/60 27/70+21/12 27/10+21/84