Add 54/18 and 12/15
1st number: 3 0/18, 2nd number: 12/15
54/18 + 12/15 is 19/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
54/18 = 54 × 5/18 × 5 = 270/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
12/15 = 12 × 6/15 × 6 = 72/90 - Add the two like fractions:
270/90 + 72/90 = 270 + 72/90 = 342/90 - 342/90 simplified gives 19/5
- So, 54/18 + 12/15 = 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: 54/18+24/15 54/36+12/15 54/18+12/30 54/18+36/15 54/18+12/45 54/18+60/15 54/90+12/15 54/18+12/75 54/18+84/15