Add 10/12 and 21/54
10/12 + 21/54 is 11/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 54 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 12 × 9 = 108,
10/12 = 10 × 9/12 × 9 = 90/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
21/54 = 21 × 2/54 × 2 = 42/108 - Add the two like fractions:
90/108 + 42/108 = 90 + 42/108 = 132/108 - 132/108 simplified gives 11/9
- So, 10/12 + 21/54 = 11/9
In mixed form: 12/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/12+21/54 10/12+42/54 10/24+21/54 30/12+21/54 10/12+63/54 10/36+21/54 50/12+21/54 10/60+21/54 70/12+21/54 10/84+21/54