Add 12/27 and 7/21
12/27 + 7/21 is 7/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 21 is 189
Next, find the equivalent fraction of both fractional numbers with denominator 189 - For the 1st fraction, since 27 × 7 = 189,
12/27 = 12 × 7/27 × 7 = 84/189 - Likewise, for the 2nd fraction, since 21 × 9 = 189,
7/21 = 7 × 9/21 × 9 = 63/189 - Add the two like fractions:
84/189 + 63/189 = 84 + 63/189 = 147/189 - 147/189 simplified gives 7/9
- So, 12/27 + 7/21 = 7/9
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