Add 12/28 and 42/20
1st number: 12/28, 2nd number: 2 2/20
12/28 + 42/20 is 177/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
12/28 = 12 × 5/28 × 5 = 60/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Add the two like fractions:
60/140 + 294/140 = 60 + 294/140 = 354/140 - 354/140 simplified gives 177/70
- So, 12/28 + 42/20 = 177/70
In mixed form: 237/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28+42/20 12/28+84/20 12/56+42/20 12/28+42/40 36/28+42/20 12/84+42/20 12/28+42/60 60/28+42/20 84/28+42/20