To find the number of female passengers, we start with the total number of passengers and subtract the number of male passengers.
The total number of passengers is given as 93, and the number of male passengers is 26. Therefore, the number of female passengers is:
\[ \text{Number of female passengers} = \text{Total passengers} - \text{Number of male passengers} = 93 - 26 = 67 \]
Now, we want to find the ratio of the number of female passengers to the total number of passengers. This ratio can be expressed as:
\[ \text{Ratio} = \frac{\text{Number of female passengers}}{\text{Total number of passengers}} = \frac{67}{93} \]
This fraction \(\frac{67}{93}\) cannot be simplified further, since 67 is a prime number and does not have common factors with 93 (which is \(3 \times 31\)).
Thus, the final answer for the ratio of female passengers to the total number of passengers is:
\[ \frac{67}{93} \]
So, the ratio of the number of female passengers to the total number of passengers is \(\frac{67}{93}\).