Help for MS Access homework

For our homework in our Computer science class, we were tasked to research by asking expert advice on database forums. We were first asked to download Census data to be analyzed using Microsoft Access. The data contained facts about 1% all people living in large US Cities at the time on the last US Census in the year 2000. The file gave the name of the city and the racial/ethnic ancestry of the person concerned.
I was able to achieve the objectives of the first task by illustrating the ff terms: fields, records, key fields, primary keys, foreign keys, relationship, and SQL.
To finish the task, we need to create a sorted list showing the number of Filipinos living in each city (with the cities with the largest number of Filipinos at the top).
I am not sure how to do this exactly. I need your advice on how to adapt the fragment of code below to show:
a) Two columns - the Filipino Population and the Total Population
b) The Filipino Population as a percentage of the total population
The code is:
SELECT DISTINCTROW POPDATA.CITYNUM
COUNT (*) FROM POPDATA
WHERE POPDATA.ANCNUMBER=720
GROUP BY POPDATA.CITYNUM
ORDER BY COUNT (*) DESC;
Thank you so much! I would really appreciate your advice on this.

I really wish my homework had been to ask someone else to do it for me.
Ah, learning - those were the days, eh?
Actually, my approach to this assignment would have been to do it myself with the belief that that 'would show them'!

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    CALL SCREEN 100.
    MODULE CANCEL INPUT.
    LEAVE PROGRAM.
    ENDMODULE.
    The next screen (statically defined) for screen 100 is itself. It has the following layout:
    602 April 2001
    Cancel
    Airline
    Flight number
    Screen field with search help
    Input help in the flow logic
    The input fields have been adopted from the program fields CARRIER and
    CONNECTION. The function code of the pushbutton is CANCEL, with function type
    E. The search help DEMO_F4_DE with the search help parameter CARRID is
    assigned to the screen field CARRIER. The search help uses the database table
    SCARR.
    The screen flow logic is as follows:
    PROCESS BEFORE OUTPUT.
    PROCESS AFTER INPUT.
    MODULE CANCEL AT EXIT-COMMAND.
    FIELD CARRIER VALUES ('AA', 'LH').
    FIELD CONNECTION SELECT *
    FROM SPFLI
    WHERE CARRID = CARRIER
    AND CONNID = CONNECTION.
    When the user chooses the input help for the individual fields, the following input
    help is displayed:
      For the Airline field, the search help displays the names of the airlines and places the airline
    code in the input field for the chosen line. If the airline code is not one of those listed in the
    VALUES list of the screen flow logic, the input check triggers an error message in the PAI
    event. So the search help overrides the VALUES addition for the input help, but not for the
    input checks. This is therefore not an appropriate place to use the VALUE addition.
      For the Flight number field, the flow logic displays the selected entries from the database
    table SPFLI and places the selected line in the input field.
    Regards,
    Bhaskar

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