Add 15/12 and 21/54
1st number: 1 3/12, 2nd number: 21/54
15/12 + 21/54 is 59/36.
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,
15/12 = 15 × 9/12 × 9 = 135/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
21/54 = 21 × 2/54 × 2 = 42/108 - Add the two like fractions:
135/108 + 42/108 = 135 + 42/108 = 177/108 - 177/108 simplified gives 59/36
- So, 15/12 + 21/54 = 59/36
In mixed form: 123/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12+21/54 15/12+42/54 15/24+21/54 45/12+21/54 15/12+63/54 15/36+21/54 75/12+21/54 15/60+21/54 15/84+21/54