Add 40/21 and 30/81
1st number: 1 19/21, 2nd number: 30/81
40/21 + 30/81 is 430/189.
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,
40/21 = 40 × 27/21 × 27 = 1080/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
30/81 = 30 × 7/81 × 7 = 210/567 - Add the two like fractions:
1080/567 + 210/567 = 1080 + 210/567 = 1290/567 - 1290/567 simplified gives 430/189
- So, 40/21 + 30/81 = 430/189
In mixed form: 252/189
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