Add 20/84 and 21/81
20/84 + 21/81 is 94/189.
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,
20/84 = 20 × 27/84 × 27 = 540/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
21/81 = 21 × 28/81 × 28 = 588/2268 - Add the two like fractions:
540/2268 + 588/2268 = 540 + 588/2268 = 1128/2268 - 1128/2268 simplified gives 94/189
- So, 20/84 + 21/81 = 94/189
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