To find the ratio of the number of adults to the total number of people on the field trip, we first need to determine the total number of people.
The total number of people is the sum of adults and students:
\[ \text{Total number of people} = \text{Number of adults} + \text{Number of students} = 12 + 14 = 26 \]
Now we can set up the ratio of the number of adults (12) to the total number of people (26):
\[ \text{Ratio of adults to total people} = \frac{12}{26} \]
To simplify this fraction, we can divide both the numerator and the denominator by their greatest common divisor, which is 2:
\[ \frac{12 \div 2}{26 \div 2} = \frac{6}{13} \]
Thus, the ratio of the number of adults to the total number of people on the field trip is:
\[ \text{Ratio} = 6 \text{ to } 13 \]
Therefore, the correct answer is:
6 to 13.
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