Add 7/81 and 4/21
7/81 + 4/21 is 157/567.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 21 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
7/81 = 7 × 7/81 × 7 = 49/567 - Likewise, for the 2nd fraction, since 21 × 27 = 567,
4/21 = 4 × 27/21 × 27 = 108/567 - Add the two like fractions:
49/567 + 108/567 = 49 + 108/567 = 157/567 - So, 7/81 + 4/21 = 157/567
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