Add 84/21 and 7/81
1st number: 4 0/21, 2nd number: 7/81
84/21 + 7/81 is 331/81.
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,
84/21 = 84 × 27/21 × 27 = 2268/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
7/81 = 7 × 7/81 × 7 = 49/567 - Add the two like fractions:
2268/567 + 49/567 = 2268 + 49/567 = 2317/567 - 2317/567 simplified gives 331/81
- So, 84/21 + 7/81 = 331/81
In mixed form: 47/81
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