Add 28/45 and 18/12
1st number: 28/45, 2nd number: 1 6/12
28/45 + 18/12 is 191/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
28/45 = 28 × 4/45 × 4 = 112/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
18/12 = 18 × 15/12 × 15 = 270/180 - Add the two like fractions:
112/180 + 270/180 = 112 + 270/180 = 382/180 - 382/180 simplified gives 191/90
- So, 28/45 + 18/12 = 191/90
In mixed form: 211/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/45+18/12 28/45+36/12 28/90+18/12 28/45+18/24 84/45+18/12 28/45+54/12 28/45+18/36 28/45+90/12 28/45+18/60 28/45+18/84