Add 30/20 and 28/40
1st number: 1 10/20, 2nd number: 28/40
30/20 + 28/40 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 20 × 2 = 40,
30/20 = 30 × 2/20 × 2 = 60/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
28/40 = 28 × 1/40 × 1 = 28/40 - Add the two like fractions:
60/40 + 28/40 = 60 + 28/40 = 88/40 - 88/40 simplified gives 11/5
- So, 30/20 + 28/40 = 11/5
In mixed form: 21/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20+28/40 30/20+56/40 30/40+28/40 30/20+28/80 90/20+28/40 30/20+84/40 30/60+28/40