Add 28/4 and 20/5
1st number: 7 0/4, 2nd number: 4 0/5
28/4 + 20/5 is 11/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
28/4 = 28 × 5/4 × 5 = 140/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
20/5 = 20 × 4/5 × 4 = 80/20 - Add the two like fractions:
140/20 + 80/20 = 140 + 80/20 = 220/20 - 220/20 simplified gives 11/1
- So, 28/4 + 20/5 = 11/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4+20/5 28/4+40/5 28/8+20/5 28/4+20/10 84/4+20/5 28/4+60/5 28/12+20/5 28/4+20/15 28/20+20/5 28/4+20/25 28/4+20/35