Add 81/21 and 45/27
1st number: 3 18/21, 2nd number: 1 18/27
81/21 + 45/27 is 116/21.
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,
45/27 = 45 × 7/27 × 7 = 315/189 - Add the two like fractions:
729/189 + 315/189 = 729 + 315/189 = 1044/189 - 1044/189 simplified gives 116/21
- So, 81/21 + 45/27 = 116/21
In mixed form: 511/21
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