Final answer:
The ratio of females to all club members is 7 : 13.
Step-by-step explanation:
To find the ratio of females to all club members, we need to determine the number of females in the math club.
We know that there are 26 members in total and 12 of them are males.
To find the number of females, we subtract the number of males from the total number of members: 26 - 12 = 14.
The ratio of females to all club members is then the number of females divided by the total number of members: 14 / 26.
This can be simplified by dividing both the numerator and denominator by their greatest common divisor, which in this case is 2. So the simplified ratio is 7 / 13.