Add 7/12 and 5/81
7/12 + 5/81 is 209/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
7/12 = 7 × 27/12 × 27 = 189/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
5/81 = 5 × 4/81 × 4 = 20/324 - Add the two like fractions:
189/324 + 20/324 = 189 + 20/324 = 209/324 - So, 7/12 + 5/81 = 209/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/12+5/81 7/12+10/81 7/24+5/81 21/12+5/81 7/12+15/81 7/36+5/81 35/12+5/81 7/12+25/81 7/60+5/81 49/12+5/81 7/12+35/81 7/84+5/81