Add 8/21 and 9/81
8/21 + 9/81 is 31/63.
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,
8/21 = 8 × 27/21 × 27 = 216/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
9/81 = 9 × 7/81 × 7 = 63/567 - Add the two like fractions:
216/567 + 63/567 = 216 + 63/567 = 279/567 - 279/567 simplified gives 31/63
- So, 8/21 + 9/81 = 31/63
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