Add 18/30 and 30/18
1st number: 18/30, 2nd number: 1 12/18
18/30 + 30/18 is 34/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
18/30 = 18 × 3/30 × 3 = 54/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
30/18 = 30 × 5/18 × 5 = 150/90 - Add the two like fractions:
54/90 + 150/90 = 54 + 150/90 = 204/90 - 204/90 simplified gives 34/15
- So, 18/30 + 30/18 = 34/15
In mixed form: 24/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+30/18 18/30+60/18 18/60+30/18 18/30+30/36 54/30+30/18 18/30+90/18 18/90+30/18 18/30+30/54 90/30+30/18 18/30+30/90