Add 72/81 and 28/84
72/81 + 28/84 is 11/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 84 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
72/81 = 72 × 28/81 × 28 = 2016/2268 - Likewise, for the 2nd fraction, since 84 × 27 = 2268,
28/84 = 28 × 27/84 × 27 = 756/2268 - Add the two like fractions:
2016/2268 + 756/2268 = 2016 + 756/2268 = 2772/2268 - 2772/2268 simplified gives 11/9
- So, 72/81 + 28/84 = 11/9
In mixed form: 12/9
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