Add 9/21 and 18/27
9/21 + 18/27 is 23/21.
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,
9/21 = 9 × 9/21 × 9 = 81/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
18/27 = 18 × 7/27 × 7 = 126/189 - Add the two like fractions:
81/189 + 126/189 = 81 + 126/189 = 207/189 - 207/189 simplified gives 23/21
- So, 9/21 + 18/27 = 23/21
In mixed form: 12/21
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