Add 12/45 and 40/12
1st number: 12/45, 2nd number: 3 4/12
12/45 + 40/12 is 18/5.
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,
12/45 = 12 × 4/45 × 4 = 48/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
40/12 = 40 × 15/12 × 15 = 600/180 - Add the two like fractions:
48/180 + 600/180 = 48 + 600/180 = 648/180 - 648/180 simplified gives 18/5
- So, 12/45 + 40/12 = 18/5
In mixed form: 33/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45+40/12 12/45+80/12 12/90+40/12 12/45+40/24 36/45+40/12 12/45+40/36 60/45+40/12 12/45+40/60 84/45+40/12 12/45+40/84