Add 54/18 and 21/30
1st number: 3 0/18, 2nd number: 21/30
54/18 + 21/30 is 37/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 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 30 × 3 = 90,
21/30 = 21 × 3/30 × 3 = 63/90 - Add the two like fractions:
270/90 + 63/90 = 270 + 63/90 = 333/90 - 333/90 simplified gives 37/10
- So, 54/18 + 21/30 = 37/10
In mixed form: 37/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18+42/30 54/36+21/30 54/18+21/60 54/18+63/30 54/18+21/90 54/90+21/30