Add 28/20 and 3/7
1st number: 1 8/20, 2nd number: 3/7
28/20 + 3/7 is 64/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
28/20 = 28 × 7/20 × 7 = 196/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
3/7 = 3 × 20/7 × 20 = 60/140 - Add the two like fractions:
196/140 + 60/140 = 196 + 60/140 = 256/140 - 256/140 simplified gives 64/35
- So, 28/20 + 3/7 = 64/35
In mixed form: 129/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20+3/7 28/20+6/7 28/40+3/7 28/20+3/14 84/20+3/7 28/20+9/7 28/60+3/7 28/20+3/21 28/20+15/7 28/20+3/35 28/20+21/7 28/20+3/49