Add 20/8 and 18/30
1st number: 2 4/8, 2nd number: 18/30
20/8 + 18/30 is 31/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
20/8 = 20 × 15/8 × 15 = 300/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
18/30 = 18 × 4/30 × 4 = 72/120 - Add the two like fractions:
300/120 + 72/120 = 300 + 72/120 = 372/120 - 372/120 simplified gives 31/10
- So, 20/8 + 18/30 = 31/10
In mixed form: 31/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8+18/30 20/8+36/30 20/16+18/30 20/8+18/60 60/8+18/30 20/8+54/30 20/24+18/30 20/8+18/90 20/8+90/30 20/40+18/30 20/56+18/30