Add 40/8 and 42/81
1st number: 5 0/8, 2nd number: 42/81
40/8 + 42/81 is 149/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
40/8 = 40 × 81/8 × 81 = 3240/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
42/81 = 42 × 8/81 × 8 = 336/648 - Add the two like fractions:
3240/648 + 336/648 = 3240 + 336/648 = 3576/648 - 3576/648 simplified gives 149/27
- So, 40/8 + 42/81 = 149/27
In mixed form: 514/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8+42/81 40/8+84/81 40/16+42/81 40/24+42/81 40/56+42/81