Phyton for beginner, 18 code project, tip calculator. Help

Question

I only can solve test case 1, but idk what to do to answer test case 2, can someone help me?

Answer 1

(i) Accept bill amount as input
(ii) Calculate tip (Tip is 20% of bill amount)
(iii) Print tip
Tip should be float type
May be there is some error related to datatype
Please share the code to find the error

Answer 2

https://www.sololearn.com/discuss/2828777/?ref=app
https://www.sololearn.com/discuss/2709597/?ref=app
https://www.sololearn.com/discuss/2730527/?ref=app
https://www.sololearn.com/discuss/2690415/?ref=app