Add 40/81 and 81/70
1st number: 40/81, 2nd number: 1 11/70
40/81 + 81/70 is 9361/5670.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 70 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 81 × 70 = 5670,
40/81 = 40 × 70/81 × 70 = 2800/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
81/70 = 81 × 81/70 × 81 = 6561/5670 - Add the two like fractions:
2800/5670 + 6561/5670 = 2800 + 6561/5670 = 9361/5670 - So, 40/81 + 81/70 = 9361/5670
In mixed form: 13691/5670
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/81+81/70