n, m = map(int,input().split(' '))
voices = []
p = ['p']
h = 0
for i in range(m):
    voices.append(int(input()))

for i in range(n):
    p.append(0)

for i in voices:
    for c in range(n+1):
        if i == c:
            p[c] += 1

for i in range(1, len(p)):
    h = p[i] / m * 100
    p[i] = str(round(h, 2))
    if len(p[i]) == 4:
        p[i] += '0'
    print(p[i] + '%')
Help. what's wrong

n, m = map(int,input().split(' '))
voices = []
p = ['p']
h = 0
for i in range(m):
    voices.append(int(input()))

for i in range(n):
    p.append(0)

for i in voices:
    for c in range(n+1):
        if i == c:
            p[c] += 1

for i in range(1, len(p)):
    h = p[i] / m * 100
    print(f'{h:.2f}%')



This is your code that prints the right answer. Python 3 uses BANKER'S rounding while the problem asks you to the MATHEMATICAL rounding. I used 'f-string' to perform MATHEMATICAL rounding. Anyways, the solution is not fast enough - try to come up with some speed-ups.