I need help building an expression within a query or report.
I have 2 queries I am utilizing to create a new query.
The first query (Paid) houses this information:
    Month      Sum of Paid
      1                100
      2                 450
      3                 700
      .
      .
      12                200
Months are from 1-12.
The second query (Balance) houses this information
    Month        Balance of Account
     1                    1000
     2                    1000
     3                     5000
     .
     .
     12                   1000
Months are from 1-12.

I am looking to create a new query utilizing the above queries to create an
expression that will do the following by month
   Month               Percent
    1                       month1 balance/month 1 paid
    2                     sum of month1 and 2 balance/month 2 paid
    3                     sum of month 1,2 and 3 balance/month 3 paid
    .
    .
    12                  sum of months 1-12 balance/month 12 paid

Any help would be appreciated.