How to round down only the decimal places

Question

I'm trying to round the following number as follows:

6.89 <- dollars and cents

I need to use this number in calculations rounded down to the nearest 10c.
Therefore I need: 6.80

To clarify I need a way to obtain the following example results:

1.32 --> 1.30  
1.55 --> 1.50  
6.89 --> 6.80

I can't seen how this can be done with Round or Floor.

You're looking for "Round to Nearest." See the duplicate I linked; it outlines the general principles. — Robert Harvey, Jan 27 '15 at 16:23
Why do you consider the result of `Math.Round(d, 1)` incorrect? As far as I see, it's what you need. Am I wrong? — Mark Shevchenko, Jan 27 '15 at 16:26
No I don't want to display anything - I need to use the figures in calculations — Peanut, Jan 27 '15 at 16:31
I have edited your title. Please see, "[Should questions include “tags” in their titles?](http://meta.stackexchange.com/questions/19190/)", where the consensus is "no, they should not". — John Saunders, Jan 27 '15 at 16:32
As stated below - the dups don't answer my specific question. I didn't realise this was a general principle site ... I thought it was a answers site. My bad. — Peanut, Jan 27 '15 at 16:58

score 2 · Accepted Answer · answered Jan 27 '15 at 16:26

2

Just use this, I don't see any error with that, and works well with your examples.

Math.Floor (number*10)/10

answered Jan 27 '15 at 16:26

user 12321

use this in case you want to make it a string at the end, string myString = myInt.ToString(); – user 12321 Jan 27 '15 at 16:27
Thank you for your answer. So many people attack ... and the dup questions aren't even dup. This site has become so poor – Peanut Jan 27 '15 at 16:35

1 Answers1