Add 18/21 and 24/81
18/21 + 24/81 is 218/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 21 × 27 = 567,
18/21 = 18 × 27/21 × 27 = 486/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
24/81 = 24 × 7/81 × 7 = 168/567 - Add the two like fractions:
486/567 + 168/567 = 486 + 168/567 = 654/567 - 654/567 simplified gives 218/189
- So, 18/21 + 24/81 = 218/189
In mixed form: 129/189
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