Add 81/54 and 12/18
1st number: 1 27/54, 2nd number: 12/18
81/54 + 12/18 is 13/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 18 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
81/54 = 81 × 1/54 × 1 = 81/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
12/18 = 12 × 3/18 × 3 = 36/54 - Add the two like fractions:
81/54 + 36/54 = 81 + 36/54 = 117/54 - 117/54 simplified gives 13/6
- So, 81/54 + 12/18 = 13/6
In mixed form: 21/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/54+24/18 81/54+12/36 81/54+36/18 81/54+12/54 81/54+60/18 81/54+12/90 81/54+84/18