Add 18/21 and 7/27
18/21 + 7/27 is 211/189.
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,
18/21 = 18 × 9/21 × 9 = 162/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
7/27 = 7 × 7/27 × 7 = 49/189 - Add the two like fractions:
162/189 + 49/189 = 162 + 49/189 = 211/189 - So, 18/21 + 7/27 = 211/189
In mixed form: 122/189
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