How to use variables in SQL raiserror

%s is used for varchar and your variable is of type int hence you need to try to use correct format specifier ie, %d

DECLARE @MaxAmount int = 16;
DECLARE @minAmount int = 1;
Raiserror('Total Amount should be less than %d and Greater than %d',@MaxAmount,@MinAmount)

Check RAISEERROR for details.

You need to use %I for integers and as mentioned, declare the variables before use.

declare @MaxAmount int, @MinAmount int
select @MaxAmount = 50, @MinAmount = 5
Raiserror('Total Amount should be less than %i and Greater than %i',16,1,@MaxAmount,@MinAmount)

I think you try in this way:

DECLARE @MaxAmount int = 16;
DECLARE @MinAmount int = 1;

Raiserror('Total Amount should be less than %d and Greater than %d',@MaxAmount,@MinAmount)

If you want further information about RAISERROR, go here