How to round a double value to the lowest quarter in c#?

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How to round a double value to the lowest quarter in c#?

double value 12.44 should round to 12.25,
12.20 to 12
12.60 to 12.50
11.30 to 11.25

I have use following formula to round up the value.
It returns 12.60 to 12.50 but not 12.44 to 12.25

Math.Round(12.44 * 4 / 4) = 12.50

Thank you.

Posted 31-Mar-15 8:28am

peoria123

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Mario Z · Accepted Answer · 2015-03-31T08:47:00

Solution 1

Use Floor instead of Round.

C#

double number = 12.44;
double result = Math.Floor(number * 4) / 4;

Posted 31-Mar-15 8:47am

Mario Z

Comments

Thomas Daniels 31-Mar-15 14:50pm

+5

Thomas Daniels · Accepted Answer · 2015-03-31T08:48:00

Solution 2

Try this:

C#

// where "d" is your double
double lowestQuarter = Math.Floor(4 * d) / 4;

Results:

12.20 -> 12
12.60 -> 12.5
11.30 -> 11.25
9.90  -> 9.75

Posted 31-Mar-15 8:48am

Thomas Daniels