When using a floating-point datatype, you will see a rounding of numeric values, such as the following:
Floating Point Rounding Precision
|Value Entered||Value in the floating-point standard|
In this case, precision of a numerical quantity is the measure of the detail in which the quantity is expressed in decimal digits.
For more information about the loss of precision in floating-point numbers, see the following article.Why Do My Floating Point Numbers Lose Precision?