Add 3/12 and 18/20
3/12 + 18/20 is 23/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
3/12 = 3 × 5/12 × 5 = 15/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Add the two like fractions:
15/60 + 54/60 = 15 + 54/60 = 69/60 - 69/60 simplified gives 23/20
- So, 3/12 + 18/20 = 23/20
In mixed form: 13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12+18/20 3/12+36/20 3/24+18/20 3/12+18/40 9/12+18/20 3/12+54/20 3/36+18/20 3/12+18/60 15/12+18/20 3/12+90/20 3/60+18/20 21/12+18/20 3/84+18/20