Add 28/40 and 2/12
28/40 + 2/12 is 13/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
28/40 = 28 × 3/40 × 3 = 84/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
2/12 = 2 × 10/12 × 10 = 20/120 - Add the two like fractions:
84/120 + 20/120 = 84 + 20/120 = 104/120 - 104/120 simplified gives 13/15
- So, 28/40 + 2/12 = 13/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/40+2/12 28/40+4/12 28/80+2/12 28/40+2/24 84/40+2/12 28/40+6/12 28/40+2/36 28/40+10/12 28/40+2/60 28/40+14/12 28/40+2/84