Add 72/18 and 54/12
1st number: 4 0/18, 2nd number: 4 6/12
72/18 + 54/12 is 17/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
72/18 = 72 × 2/18 × 2 = 144/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
54/12 = 54 × 3/12 × 3 = 162/36 - Add the two like fractions:
144/36 + 162/36 = 144 + 162/36 = 306/36 - 306/36 simplified gives 17/2
- So, 72/18 + 54/12 = 17/2
In mixed form: 81/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/36+54/12 72/18+54/24 72/54+54/12 72/18+54/36 72/90+54/12 72/18+54/60 72/18+54/84