C# - Having trouble dividing by a 0.x number

Question

My C# program requires two numerical outputs. A main price will be divided by 20% and 10%.

For example: Main price = 200 Discounted price: 20% of 200 = 40. Therefore total price is now 160.

I am having issues converting decimals, int's, etc. Here is what I have tried.

int discountNumber = 20 / 100;
decimal DiscountedPrice = Convert.ToInt32(TotalPrice)
                          / Convert.ToInt32(discountNumber);
txtTotalPrice.Text = DiscountedPrice.ToString();

You need to make one of your operands decimal - two integers will only return an int (the decimal portion will just be discarded) — Charleh, Jun 09 '14 at 11:58

score 0 · Answer 1 · answered Jun 09 '14 at 11:57

0

The problem in the

  int discountNumber = 20 / 100;

it's always zero

answered Jun 09 '14 at 11:57

Dmitry Bychenko

180,369
20
160
215

score -1 · Answer 2 · answered Jun 09 '14 at 11:58

-1

change the int to a double. 20/100 will give you a decimal figure not an int

answered Jun 09 '14 at 11:58

user3437235

92
3
9

2

and 20/100 will still give 0... – Adriano Repetti Jun 09 '14 at 11:58
Know the difference between Decimal and Double - http://stackoverflow.com/questions/618535/what-is-the-difference-between-decimal-float-and-double-in-net – Colin Banbury Jun 09 '14 at 12:00
I changed the int to a double and it still gives a 0? How do i get a 0.2 to divide by the total? – user3722228 Jun 09 '14 at 12:04
I don't really understand how you're doing it to be honest. You should divide your percentage by 100 then multiply it by the number you wish to find the percentage of... eg: 50% of 20: 50/100 = 0.5 0.5*20= 10 – user3437235 Jun 09 '14 at 12:06
so for 20% I did 20 / 100 which is 0.2 then the total price divided by that is the discounted price – user3722228 Jun 09 '14 at 12:08
yeah you should be multiplying – user3437235 Jun 09 '14 at 12:20
0.2 * discountedprice? – user3437235 Jun 09 '14 at 12:22

C# - Having trouble dividing by a 0.x number

2 Answers2