Add 12/21 and 72/27
1st number: 12/21, 2nd number: 2 18/27
12/21 + 72/27 is 68/21.
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,
12/21 = 12 × 9/21 × 9 = 108/189 - Likewise, for the 2nd fraction, since 27 × 7 = 189,
72/27 = 72 × 7/27 × 7 = 504/189 - Add the two like fractions:
108/189 + 504/189 = 108 + 504/189 = 612/189 - 612/189 simplified gives 68/21
- So, 12/21 + 72/27 = 68/21
In mixed form: 35/21
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