Hello
my problem is how to reduce decimal number of column in the tables. Problem is that some numbers are quotients and they have a lot of decimal which make a problem in the report where they have to have just 2 decimals.
Column in the query and in the report is not reserved only for numbers.
if some one have idea?

Don't worry about the decimals of a number in a table. Formatting the numbers on forms and/or reports standardizes your numbers. Note that roundoff errors are always present.