Add 15/21 and 84/81
1st number: 15/21, 2nd number: 1 3/81
15/21 + 84/81 is 331/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
15/21 = 15 × 27/21 × 27 = 405/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
84/81 = 84 × 7/81 × 7 = 588/567 - Add the two like fractions:
405/567 + 588/567 = 405 + 588/567 = 993/567 - 993/567 simplified gives 331/189
- So, 15/21 + 84/81 = 331/189
In mixed form: 1142/189
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