Add 4/21 and 27/81
4/21 + 27/81 is 11/21.
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,
4/21 = 4 × 27/21 × 27 = 108/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
27/81 = 27 × 7/81 × 7 = 189/567 - Add the two like fractions:
108/567 + 189/567 = 108 + 189/567 = 297/567 - 297/567 simplified gives 11/21
- So, 4/21 + 27/81 = 11/21
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