Add 21/81 and 8/63
21/81 + 8/63 is 73/189.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 63 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
21/81 = 21 × 7/81 × 7 = 147/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
8/63 = 8 × 9/63 × 9 = 72/567 - Add the two like fractions:
147/567 + 72/567 = 147 + 72/567 = 219/567 - 219/567 simplified gives 73/189
- So, 21/81 + 8/63 = 73/189
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