This is a simple script to figure out what your grade is, or where you're currently sitting at if you haven't got all your assessments back.

grades.py

fin_tot   = 0
fin_worth = 0

def style_text(one,two):
    print()
    print('#'*50)
    print(one)    
    print(two)
    print('#'*50)
    print()
    
while True:
    marks = input("What is your mark: ")
    
    if marks == 'q': exit(0)   
    
    marks = marks.split("/")
    percentage = float(marks[0]) / float(marks[1]) * 100
    worth = float(input("What is the assessment worth: "))
    total = worth / 100 * percentage
    fin_tot   += total
    fin_worth += worth  
    fin_percent = fin_tot/fin_worth * 100  
    
    if fin_percent < 50:
        print("Sorry, you failed the assessment")
    elif fin_percent >= 50 and fin_percent < 65:            
        style_text(("Your mark thus far is %.2f/%d" % (fin_tot,fin_worth)),"You're sitting on a Pass with %d%%" % (fin_percent))
    elif fin_percent >= 65 and fin_percent < 75:            
        style_text(("Your mark thus far is %.2f/%d" % (fin_tot,fin_worth)),"You're sitting on a Credit with %d%%" % (fin_percent))
    elif fin_percent >= 75 and fin_percent < 85:            
        style_text(("Your mark thus far is %.2f/%d" % (fin_tot,fin_worth)),"You're sitting on a Distinction with %d%%" % (fin_percent))
    elif fin_percent >= 85:            
        style_text(("Your mark thus far is %.2f/%d" % (fin_tot,fin_worth)),"You're sitting on a High Distinction with %d%%" % (fin_percent))
    if fin_worth == 100: exit(0)