Add 3/7 and 84/81
1st number: 3/7, 2nd number: 1 3/81
3/7 + 84/81 is 277/189.
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,
3/7 = 3 × 81/7 × 81 = 243/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
84/81 = 84 × 7/81 × 7 = 588/567 - Add the two like fractions:
243/567 + 588/567 = 243 + 588/567 = 831/567 - 831/567 simplified gives 277/189
- So, 3/7 + 84/81 = 277/189
In mixed form: 188/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7+84/81 3/14+84/81 9/7+84/81 3/21+84/81 15/7+84/81 3/35+84/81 21/7+84/81 3/49+84/81