def petrol():
    while True:
        try:
            fract = input('Enter fraction here ')
            x , y = fract.split('/')
            a = int(x)
            b = int(y)
            k = int(a*100/b)
            if 0<= k <=1:
                print('E')
            if 1 <= k <=99:
                print(k,"%", sep ='')
            if 99< k<=100:
                print("F")
            if k > 100:
                return False
        except (ValueError, ZeroDivisionError ,):
            pass
        

I’m trying to get a prompt when percentage exceeds 100 and no prompt when the percentage is under 100, but the opposite is happening
I am a beginner and have only done a few classes so answer accordingly if possible