Add 84/45 and 21/81
1st number: 1 39/45, 2nd number: 21/81
84/45 + 21/81 is 287/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
84/45 = 84 × 9/45 × 9 = 756/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
21/81 = 21 × 5/81 × 5 = 105/405 - Add the two like fractions:
756/405 + 105/405 = 756 + 105/405 = 861/405 - 861/405 simplified gives 287/135
- So, 84/45 + 21/81 = 287/135
In mixed form: 217/135
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