Check out example codes for "how to convert a number to 2 decimal places in c#". It will help you in understanding the concepts better.

Code Example 1

// just two decimal places
String.Format("{0:0.##}", 123.4567);      // "123.46"
String.Format("{0:0.##}", 123.4);         // "123.4"
String.Format("{0:0.##}", 123.0);         // "123"

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