Add 45/12 and 20/54
1st number: 3 9/12, 2nd number: 20/54
45/12 + 20/54 is 445/108.
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,
45/12 = 45 × 9/12 × 9 = 405/108 - Likewise, for the 2nd fraction, since 54 × 2 = 108,
20/54 = 20 × 2/54 × 2 = 40/108 - Add the two like fractions:
405/108 + 40/108 = 405 + 40/108 = 445/108 - So, 45/12 + 20/54 = 445/108
In mixed form: 413/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+20/54 45/12+40/54 45/24+20/54 45/12+60/54 45/36+20/54 45/60+20/54 45/84+20/54