Add 40/21 and 21/81
1st number: 1 19/21, 2nd number: 21/81
40/21 + 21/81 is 409/189.
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,
21/81 = 21 × 7/81 × 7 = 147/567 - Add the two like fractions:
1080/567 + 147/567 = 1080 + 147/567 = 1227/567 - 1227/567 simplified gives 409/189
- So, 40/21 + 21/81 = 409/189
In mixed form: 231/189
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