Why does my code work incorrectly?

Question

https://code.sololearn.com/cjK3zuiVvjSf/?ref=app
Tack: Haloween Candy from practice in community

Answer 1

Nikolai

Math.Ceiling(chance);

Answer 2

Nikolai

Math.Round(4.3) = 4.0
Math.Ceiling(4.3) = 5.0

Answer 3

Task:
You go trick or treating with a friend and all but three of the houses that you visit are giving out candy. One house that you visit is giving out toothbrushes and two houses are giving out dollar bills.

Task
Given the input of the total number of houses that you visited, what is the percentage chance that one random item pulled from your bag is a dollar bill?

Input Format
An integer (>=3) representing the total number of houses that you visited.

Output Format
A percentage value rounded up to the nearest whole number.

Sample Input
4

Sample Output
50

Answer 4

AJ
Thank you , now it actually works!

But I would like to know what is the real difference between Math methods Ceiling and Round , for me its absolutely same