Add 81/21 and 15/27
1st number: 3 18/21, 2nd number: 15/27
81/21 + 15/27 is 278/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 21 × 9 = 189,
81/21 = 81 × 9/21 × 9 = 729/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
15/27 = 15 × 7/27 × 7 = 105/189 - Add the two like fractions:
729/189 + 105/189 = 729 + 105/189 = 834/189 - 834/189 simplified gives 278/63
- So, 81/21 + 15/27 = 278/63
In mixed form: 426/63
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