Add 7/84 and 1/81
7/84 + 1/81 is 31/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 84 × 27 = 2268,
7/84 = 7 × 27/84 × 27 = 189/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
1/81 = 1 × 28/81 × 28 = 28/2268 - Add the two like fractions:
189/2268 + 28/2268 = 189 + 28/2268 = 217/2268 - 217/2268 simplified gives 31/324
- So, 7/84 + 1/81 = 31/324
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