Add 18/30 and 3/12
18/30 + 3/12 is 17/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
18/30 = 18 × 2/30 × 2 = 36/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
3/12 = 3 × 5/12 × 5 = 15/60 - Add the two like fractions:
36/60 + 15/60 = 36 + 15/60 = 51/60 - 51/60 simplified gives 17/20
- So, 18/30 + 3/12 = 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30+3/12 18/30+6/12 18/60+3/12 18/30+3/24 54/30+3/12 18/30+9/12 18/90+3/12 18/30+3/36 90/30+3/12 18/30+15/12 18/30+3/60 18/30+21/12 18/30+3/84