Add 28/8 and 40/20
1st number: 3 4/8, 2nd number: 2 0/20
28/8 + 40/20 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
28/8 = 28 × 5/8 × 5 = 140/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
40/20 = 40 × 2/20 × 2 = 80/40 - Add the two like fractions:
140/40 + 80/40 = 140 + 80/40 = 220/40 - 220/40 simplified gives 11/2
- So, 28/8 + 40/20 = 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: 56/8+40/20 28/8+80/20 28/16+40/20 84/8+40/20 28/24+40/20 28/8+40/60 28/40+40/20 28/56+40/20