Add 54/15 and 84/18
1st number: 3 9/15, 2nd number: 4 12/18
54/15 + 84/18 is 124/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
54/15 = 54 × 6/15 × 6 = 324/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
84/18 = 84 × 5/18 × 5 = 420/90 - Add the two like fractions:
324/90 + 420/90 = 324 + 420/90 = 744/90 - 744/90 simplified gives 124/15
- So, 54/15 + 84/18 = 124/15
In mixed form: 84/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30+84/18 54/15+84/36 54/45+84/18 54/15+84/54 54/75+84/18 54/15+84/90