Add 54/15 and 18/90
1st number: 3 9/15, 2nd number: 18/90
54/15 + 18/90 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 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 90 × 1 = 90,
18/90 = 18 × 1/90 × 1 = 18/90 - Add the two like fractions:
324/90 + 18/90 = 324 + 18/90 = 342/90 - 342/90 simplified gives 19/5
- So, 54/15 + 18/90 = 19/5
In mixed form: 34/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/15+36/90 54/30+18/90 54/15+54/90 54/45+18/90 54/75+18/90