Add 72/20 and 28/5
1st number: 3 12/20, 2nd number: 5 3/5
72/20 + 28/5 is 46/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
72/20 = 72 × 1/20 × 1 = 72/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
28/5 = 28 × 4/5 × 4 = 112/20 - Add the two like fractions:
72/20 + 112/20 = 72 + 112/20 = 184/20 - 184/20 simplified gives 46/5
- So, 72/20 + 28/5 = 46/5
In mixed form: 91/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+56/5 72/40+28/5 72/20+28/10 72/20+84/5 72/60+28/5 72/20+28/15 72/20+28/25 72/20+28/35