why is this wrong, i have been trying to figure it out for 2 days.(26 in the python course)

Question

x = input()
y = input()
z = (x / (y ** 2))
if (z < 18.5):
print ("Underweight")
elif (z >= 18.5 and z < 25):
print ("Normal")
elif (z >= 25 and z < 30):
print ("Overweight")
elif (z >= 30):
print ("Obesity")

Answer 1

Use x= float(input())
y=float(input())

Answer 2

I am not sure about the exact breaking points for the classification, but for now you are taking input as string, not as a numeric type.

Prefix the calls to input() with a float() for conversion: x = float(input())