Add 30/20 and 28/7
1st number: 1 10/20, 2nd number: 4 0/7
30/20 + 28/7 is 11/2.
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,
30/20 = 30 × 7/20 × 7 = 210/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
28/7 = 28 × 20/7 × 20 = 560/140 - Add the two like fractions:
210/140 + 560/140 = 210 + 560/140 = 770/140 - 770/140 simplified gives 11/2
- So, 30/20 + 28/7 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+28/7 30/20+56/7 30/40+28/7 30/20+28/14 90/20+28/7 30/20+84/7 30/60+28/7 30/20+28/21 30/20+28/35 30/20+28/49