Add 1/21 and 30/81
1/21 + 30/81 is 79/189.
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,
1/21 = 1 × 27/21 × 27 = 27/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
30/81 = 30 × 7/81 × 7 = 210/567 - Add the two like fractions:
27/567 + 210/567 = 27 + 210/567 = 237/567 - 237/567 simplified gives 79/189
- So, 1/21 + 30/81 = 79/189
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