Add 21/36 and 1/81
21/36 + 1/81 is 193/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 36 × 9 = 324,
21/36 = 21 × 9/36 × 9 = 189/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
1/81 = 1 × 4/81 × 4 = 4/324 - Add the two like fractions:
189/324 + 4/324 = 189 + 4/324 = 193/324 - So, 21/36 + 1/81 = 193/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/36+1/81 21/36+2/81 21/72+1/81 63/36+1/81 21/36+3/81 21/36+5/81 21/36+7/81