Add 30/8 and 40/12
1st number: 3 6/8, 2nd number: 3 4/12
30/8 + 40/12 is 85/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
30/8 = 30 × 3/8 × 3 = 90/24 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
40/12 = 40 × 2/12 × 2 = 80/24 - Add the two like fractions:
90/24 + 80/24 = 90 + 80/24 = 170/24 - 170/24 simplified gives 85/12
- So, 30/8 + 40/12 = 85/12
In mixed form: 71/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8+40/12 30/8+80/12 30/16+40/12 30/8+40/24 90/8+40/12 30/24+40/12 30/8+40/36 30/40+40/12 30/8+40/60 30/56+40/12 30/8+40/84