Add 84/7 and 18/81
1st number: 12 0/7, 2nd number: 18/81
84/7 + 18/81 is 110/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
84/7 = 84 × 81/7 × 81 = 6804/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
18/81 = 18 × 7/81 × 7 = 126/567 - Add the two like fractions:
6804/567 + 126/567 = 6804 + 126/567 = 6930/567 - 6930/567 simplified gives 110/9
- So, 84/7 + 18/81 = 110/9
In mixed form: 122/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7+36/81 84/14+18/81 84/7+54/81 84/21+18/81 84/7+90/81 84/35+18/81 84/49+18/81