Add 28/72 and 12/18
28/72 + 12/18 is 19/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
28/72 = 28 × 1/72 × 1 = 28/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
12/18 = 12 × 4/18 × 4 = 48/72 - Add the two like fractions:
28/72 + 48/72 = 28 + 48/72 = 76/72 - 76/72 simplified gives 19/18
- So, 28/72 + 12/18 = 19/18
In mixed form: 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/72+12/18 28/72+24/18 28/72+12/36 84/72+12/18 28/72+36/18 28/72+12/54 28/72+60/18 28/72+12/90 28/72+84/18