Add 90/21 and 12/81
1st number: 4 6/21, 2nd number: 12/81
90/21 + 12/81 is 838/189.
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,
90/21 = 90 × 27/21 × 27 = 2430/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
12/81 = 12 × 7/81 × 7 = 84/567 - Add the two like fractions:
2430/567 + 84/567 = 2430 + 84/567 = 2514/567 - 2514/567 simplified gives 838/189
- So, 90/21 + 12/81 = 838/189
In mixed form: 482/189
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