Add 3/81 and 5/7
3/81 + 5/7 is 142/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
3/81 = 3 × 7/81 × 7 = 21/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
5/7 = 5 × 81/7 × 81 = 405/567 - Add the two like fractions:
21/567 + 405/567 = 21 + 405/567 = 426/567 - 426/567 simplified gives 142/189
- So, 3/81 + 5/7 = 142/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/81+5/7 3/81+10/7 3/81+5/14 9/81+5/7 3/81+15/7 3/81+5/21 15/81+5/7 3/81+25/7 3/81+5/35 21/81+5/7 3/81+35/7 3/81+5/49