Add 40/8 and 81/18
1st number: 5 0/8, 2nd number: 4 9/18
40/8 + 81/18 is 19/2.
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,
81/18 = 81 × 4/18 × 4 = 324/72 - Add the two like fractions:
360/72 + 324/72 = 360 + 324/72 = 684/72 - 684/72 simplified gives 19/2
- So, 40/8 + 81/18 = 19/2
In mixed form: 91/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+81/18 40/16+81/18 40/8+81/36 40/24+81/18 40/8+81/54 40/8+81/90 40/56+81/18