Add 30/8 and 20/5
1st number: 3 6/8, 2nd number: 4 0/5
30/8 + 20/5 is 31/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 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 5 × 8 = 40,
20/5 = 20 × 8/5 × 8 = 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 + 20/5 = 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+20/5 30/8+40/5 30/16+20/5 30/8+20/10 90/8+20/5 30/8+60/5 30/24+20/5 30/8+20/15 30/40+20/5 30/8+20/25 30/56+20/5 30/8+20/35