Add 12/21 and 6/81
12/21 + 6/81 is 122/189.
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,
12/21 = 12 × 27/21 × 27 = 324/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
6/81 = 6 × 7/81 × 7 = 42/567 - Add the two like fractions:
324/567 + 42/567 = 324 + 42/567 = 366/567 - 366/567 simplified gives 122/189
- So, 12/21 + 6/81 = 122/189
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