Add 30/8 and 30/18
1st number: 3 6/8, 2nd number: 1 12/18
30/8 + 30/18 is 65/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
30/8 = 30 × 9/8 × 9 = 270/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
30/18 = 30 × 4/18 × 4 = 120/72 - Add the two like fractions:
270/72 + 120/72 = 270 + 120/72 = 390/72 - 390/72 simplified gives 65/12
- So, 30/8 + 30/18 = 65/12
In mixed form: 55/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8+30/18 30/8+60/18 30/16+30/18 30/8+30/36 90/8+30/18 30/8+90/18 30/24+30/18 30/8+30/54 30/40+30/18 30/8+30/90 30/56+30/18