Add 81/7 and 21/27
1st number: 11 4/7, 2nd number: 21/27
81/7 + 21/27 is 778/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 27 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 7 × 27 = 189,
81/7 = 81 × 27/7 × 27 = 2187/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
21/27 = 21 × 7/27 × 7 = 147/189 - Add the two like fractions:
2187/189 + 147/189 = 2187 + 147/189 = 2334/189 - 2334/189 simplified gives 778/63
- So, 81/7 + 21/27 = 778/63
In mixed form: 1222/63
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