Add 40/8 and 30/18
1st number: 5 0/8, 2nd number: 1 12/18
40/8 + 30/18 is 20/3.
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,
40/8 = 40 × 9/8 × 9 = 360/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
30/18 = 30 × 4/18 × 4 = 120/72 - Add the two like fractions:
360/72 + 120/72 = 360 + 120/72 = 480/72 - 480/72 simplified gives 20/3
- So, 40/8 + 30/18 = 20/3
In mixed form: 62/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+30/18 40/8+60/18 40/16+30/18 40/8+30/36 40/8+90/18 40/24+30/18 40/8+30/54 40/8+30/90 40/56+30/18