Ticket Office from python data structures

Question

I don't understand why my code doesn't work for the Ticket office project. Can someone explain the flaw in my logic? Thanks :)

data = {
"100-90": 25, "42-01": 48, "55-09": 12, "128-64": 71, "002-22": 18, "321-54": 19, "097-32": 33, "065-135": 64, "99-043": 80, "111-99": 11, "123-019": 5, "109-890": 72, "132-123": 27, "32-908": 27, "008-09": 25, "055-967": 35, "897-99": 44, "890-98": 56, "344-32": 65, "43-955": 59, "001-233": 9, "089-111": 15, "090-090": 17, "56-777": 23, "44-909": 27, "13-111": 21, "87-432": 15, "87-433": 14, "87-434": 23, "87-435": 11, "87-436": 12, "87-437": 16, "94-121": 15, "94-122": 35, "80-089": 10, "87-456": 8, "87-430": 40
}
age = int(input())
old = 0
new = 0
for x in data.values():
if x > 18:
old += 20
else:
old += 5

for var in data.values():
if var > age:
new += 20
else:
new += 5

print(int((new - old) / old * 100))

Answer 1

Everything works good.
Just I'd write like:
age = int(input("enter the age: "))

Answer 2

data = {
"100-90": 25, "42-01": 48, "55-09": 12, "128-64": 71, "002-22": 18, "321-54": 19, "097-32": 33, "065-135": 64, "99-043": 80, "111-99": 11, "123-019": 5, "109-890": 72, "132-123": 27, "32-908": 27, "008-09": 25, "055-967": 35, "897-99": 44, "890-98": 56, "344-32": 65, "43-955": 59, "001-233": 9, "089-111": 15, "090-090": 17, "56-777": 23, "44-909": 27, "13-111": 21, "87-432": 15, "87-433": 14, "87-434": 23, "87-435": 11, "87-436": 12, "87-437": 16, "94-121": 15, "94-122": 35, "80-089": 10, "87-456": 8, "87-430": 40
}
age = int(input())

main = 0

new = 0

for original in data.values():
if original >= 18:
main += 20
else:
main += 5

main_total = main

for change in data.values():
if change >= age:
new += 20
else:
new += 5

new_total = new

Growth = (new_total - main_total) / main_total * 100

print(int(Growth))