Add 18/81 and 98/70
1st number: 18/81, 2nd number: 1 28/70
18/81 + 98/70 is 73/45.
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,
18/81 = 18 × 70/81 × 70 = 1260/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
98/70 = 98 × 81/70 × 81 = 7938/5670 - Add the two like fractions:
1260/5670 + 7938/5670 = 1260 + 7938/5670 = 9198/5670 - 9198/5670 simplified gives 73/45
- So, 18/81 + 98/70 = 73/45
In mixed form: 128/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+98/70 54/81+98/70 90/81+98/70