Add 45/12 and 18/5
1st number: 3 9/12, 2nd number: 3 3/5
45/12 + 18/5 is 147/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 5 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Likewise, for the 2nd fraction, since 5 × 12 = 60,
18/5 = 18 × 12/5 × 12 = 216/60 - Add the two like fractions:
225/60 + 216/60 = 225 + 216/60 = 441/60 - 441/60 simplified gives 147/20
- So, 45/12 + 18/5 = 147/20
In mixed form: 77/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+18/5 45/12+36/5 45/24+18/5 45/12+18/10 45/12+54/5 45/36+18/5 45/12+18/15 45/12+90/5 45/60+18/5 45/12+18/25 45/84+18/5 45/12+18/35