Add 21/12 and 9/81
1st number: 1 9/12, 2nd number: 9/81
21/12 + 9/81 is 67/36.
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,
21/12 = 21 × 27/12 × 27 = 567/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
9/81 = 9 × 4/81 × 4 = 36/324 - Add the two like fractions:
567/324 + 36/324 = 567 + 36/324 = 603/324 - 603/324 simplified gives 67/36
- So, 21/12 + 9/81 = 67/36
In mixed form: 131/36
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