Add 54/81 and 5/7
54/81 + 5/7 is 29/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
54/81 = 54 × 7/81 × 7 = 378/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
5/7 = 5 × 81/7 × 81 = 405/567 - Add the two like fractions:
378/567 + 405/567 = 378 + 405/567 = 783/567 - 783/567 simplified gives 29/21
- So, 54/81 + 5/7 = 29/21
In mixed form: 18/21
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