11.1.89.3   %MINUS

Decrement tag by specified amount, percentage , tag value or script variable.

 

# subtracts 1 from the value of tag named counter.
<SETVAL>counter=%MINUS 1  
 
# decreases tag2  by 1 percent of output span.
<SETVAL>tag2=%MINUS 1%
 
#  decrements tag2  by  value of tag1
<SETVAL>tag2=%MINUS @tag1