Add 30/8 and 80/20
1st number: 3 6/8, 2nd number: 4 0/20
30/8 + 80/20 is 31/4.
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,
30/8 = 30 × 5/8 × 5 = 150/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
80/20 = 80 × 2/20 × 2 = 160/40 - Add the two like fractions:
150/40 + 160/40 = 150 + 160/40 = 310/40 - 310/40 simplified gives 31/4
- So, 30/8 + 80/20 = 31/4
In mixed form: 73/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8+80/20 30/16+80/20 30/8+80/40 90/8+80/20 30/24+80/20 30/8+80/60 30/40+80/20 30/56+80/20