I use python to write program, and my professor gave me this common:

Mixture of relational operator(<, >) in if elif is not acceptable.

Do you really need last elif? Instead use else.

Percentage is not displayed as .35 its 35%.

My syntax is written like:

if user_unit_purchase < 10:

discount = 0

elif user_unit_purchase < 20:

discount = 0.20

elif user_unit_purchase < 50:

discount = 0.30

elif user_unit_purchase < 70:

discount = 0.35

elif user_unit_purchase < 100:

discount = 0.40

elif user_unit_purchase > 100:

discount=0.50

How could I improve my syntax according my professor's common?

THX