Add 21/81 and 18/84
21/81 + 18/84 is 179/378.
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,
21/81 = 21 × 28/81 × 28 = 588/2268 - Likewise, for the 2nd fraction, since 84 × 27 = 2268,
18/84 = 18 × 27/84 × 27 = 486/2268 - Add the two like fractions:
588/2268 + 486/2268 = 588 + 486/2268 = 1074/2268 - 1074/2268 simplified gives 179/378
- So, 21/81 + 18/84 = 179/378
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