Question

In survey, 19 people said they prefer cold weather. If 25% of people prefer cold weather, how many people ate their in total?

Answer 1

25% is equal to 1/4 of 100%
So if 19 people are the 25% that means that there are still 75%.

19 people is 1/4 of your population. Multiply 19 x 4 to get the total number of people in attendance.
After that you could subtract 19 to see how many preferred warm weather.