Add 45/54 and 18/12
1st number: 45/54, 2nd number: 1 6/12
45/54 + 18/12 is 7/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 12 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 54 × 2 = 108,
45/54 = 45 × 2/54 × 2 = 90/108 - Likewise, for the 2nd fraction, since 12 × 9 = 108,
18/12 = 18 × 9/12 × 9 = 162/108 - Add the two like fractions:
90/108 + 162/108 = 90 + 162/108 = 252/108 - 252/108 simplified gives 7/3
- So, 45/54 + 18/12 = 7/3
In mixed form: 21/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/54+18/12 45/54+36/12 45/54+18/24 45/54+54/12 45/54+18/36 45/54+90/12 45/54+18/60 45/54+18/84