Add 20/28 and 42/12
1st number: 20/28, 2nd number: 3 6/12
20/28 + 42/12 is 59/14.
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,
20/28 = 20 × 3/28 × 3 = 60/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
42/12 = 42 × 7/12 × 7 = 294/84 - Add the two like fractions:
60/84 + 294/84 = 60 + 294/84 = 354/84 - 354/84 simplified gives 59/14
- So, 20/28 + 42/12 = 59/14
In mixed form: 43/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/28+42/12 20/28+84/12 20/56+42/12 20/28+42/24 60/28+42/12 20/84+42/12 20/28+42/36 20/28+42/60 20/28+42/84