how do I get the answer like you don't even have to tell me the answer just tell me how to get the answer

You add the two fractions together
1/4+5/8

Make the denominators equal by finding the common denominator. Once you have that the fractions will look like
2/8 for bball hats and 5/8 for fishing hats.
After this you may now add or do what you have to in order to finish the problem.

It is 2 out of 8 she will pick green and 3 out of 7 she will pick green but red and green would be 5 out of 5 so 50% chance