Precision Field:

Sample (Precision is in red): %1<% 12.3f(E1-10)>

Precision is the third optional field. Precision is always preceded by a . character. Precision determines the number of decimal places to be output. If the value you specify is less than the number of places returned by the program, the result is rounded. .0 is permitted.

See Precison Field for information about the default digits returned for the different type specifications. Most commonly, d has default of 1 digit and f has a default of 6.