# Write your Python code here
marks=float(input(' your marks '))
print(marks)

totalmarks=float(input(' total marks ')) 
print(totalmarks)

percentage=(marks/totalmarks)*100
print('your percentage')
print( percentage)

grade = ""

if percentage < 40:
  grade = "D"
elif percentage < 60:
  grade = "C"
elif percentage < 80:
  grade = "B"
else:
  grade = "A"

print('your grade') 
print(grade)