Add 18/20 and 54/15
1st number: 18/20, 2nd number: 3 9/15
18/20 + 54/15 is 9/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
54/15 = 54 × 4/15 × 4 = 216/60 - Add the two like fractions:
54/60 + 216/60 = 54 + 216/60 = 270/60 - 270/60 simplified gives 9/2
- So, 18/20 + 54/15 = 9/2
In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20+54/15 18/40+54/15 18/20+54/30 54/20+54/15 18/60+54/15 18/20+54/45 90/20+54/15 18/20+54/75