Add 7/12 and 20/81
7/12 + 20/81 is 269/324.
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,
20/81 = 20 × 4/81 × 4 = 80/324 - Add the two like fractions:
189/324 + 80/324 = 189 + 80/324 = 269/324 - So, 7/12 + 20/81 = 269/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/12+20/81 7/12+40/81 7/24+20/81 21/12+20/81 7/12+60/81 7/36+20/81 35/12+20/81 7/60+20/81 49/12+20/81 7/84+20/81