Add 80/28 and 3/20
1st number: 2 24/28, 2nd number: 3/20
80/28 + 3/20 is 421/140.
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,
80/28 = 80 × 5/28 × 5 = 400/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
3/20 = 3 × 7/20 × 7 = 21/140 - Add the two like fractions:
400/140 + 21/140 = 400 + 21/140 = 421/140 - So, 80/28 + 3/20 = 421/140
In mixed form: 31/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28+6/20 80/56+3/20 80/28+3/40 80/28+9/20 80/84+3/20 80/28+3/60 80/28+15/20 80/28+21/20