Add 1/21 and 12/27
1/21 + 12/27 is 31/63.
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,
1/21 = 1 × 9/21 × 9 = 9/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
12/27 = 12 × 7/27 × 7 = 84/189 - Add the two like fractions:
9/189 + 84/189 = 9 + 84/189 = 93/189 - 93/189 simplified gives 31/63
- So, 1/21 + 12/27 = 31/63
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