Add 12/20 and 27/28
12/20 + 27/28 is 219/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
12/20 = 12 × 7/20 × 7 = 84/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
27/28 = 27 × 5/28 × 5 = 135/140 - Add the two like fractions:
84/140 + 135/140 = 84 + 135/140 = 219/140 - So, 12/20 + 27/28 = 219/140
In mixed form: 179/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20+27/28 12/20+54/28 12/40+27/28 12/20+27/56 36/20+27/28 12/20+81/28 12/60+27/28 12/20+27/84 60/20+27/28 84/20+27/28