Add 12/9 and 21/81
1st number: 1 3/9, 2nd number: 21/81
12/9 + 21/81 is 43/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 9 × 9 = 81,
12/9 = 12 × 9/9 × 9 = 108/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
21/81 = 21 × 1/81 × 1 = 21/81 - Add the two like fractions:
108/81 + 21/81 = 108 + 21/81 = 129/81 - 129/81 simplified gives 43/27
- So, 12/9 + 21/81 = 43/27
In mixed form: 116/27
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