Add 18/28 and 45/12
1st number: 18/28, 2nd number: 3 9/12
18/28 + 45/12 is 123/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
18/28 = 18 × 3/28 × 3 = 54/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
45/12 = 45 × 7/12 × 7 = 315/84 - Add the two like fractions:
54/84 + 315/84 = 54 + 315/84 = 369/84 - 369/84 simplified gives 123/28
- So, 18/28 + 45/12 = 123/28
In mixed form: 411/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+45/12 18/28+90/12 18/56+45/12 18/28+45/24 54/28+45/12 18/84+45/12 18/28+45/36 90/28+45/12 18/28+45/60 18/28+45/84