oracle spatial - Calculate Area proportional

I have two tables both of them having polygon geometry. Lets consider Table 1 has bigger polygons which overlap over the smaller polygons in table 2.Now I know how to find how many polygons from table 2 come under a single polygon from table 1. What I want to do is to find the proportional area for those polygons from table 2 which get intersected with the polygon from table 1.When I say proportional area I mean how much

(overlap polyon area/total area of that intersected polygon from table 2)*100.

I want find this because it would help me in calculating another value with the right proportions.

I did the below using 1 polygon from table 1. I wanted to know how could I do this for all the polygons from table 1 using cursor.

SELECT a.bg_id, (SDO_GEOM.SDO_AREA(SDO_GEOM.SDO_INTERSECTION(a.geometry,b.geometry, 0.005), 0.005, 'unit=sq_mile') /SDO_GEOM.SDO_AREA((a.geometry), 0.005, 'unit=sq_mile'))"Proportional Area"
    FROM table 1 a, table 2 b

    where b.STORE_number= '351029'
    AND SDO_Relate(a.geometry,b.geometry,'mask=anyinteract') = 'TRUE'; 

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Here is the one which I tried with cursor which doesnt work apparently.

 Declare
 Cursor c1 is 
 select store_number,geometry from stores  where CLIENT_ID= 1 and ORG_ID = 1 ;

 Type C1_TAB_TYPE is table of c1%ROWTYPE;      

 c1_list c1_TAB_TYPE;

 Begin     
           For r1 in c1 

              Loop
              Select bg_id 
               BULK COLLECT INTO c1_list from
              (
              SELECT bg_id, (SDO_GEOM.SDO_AREA(SDO_GEOM.SDO_INTERSECTION(geometry,r1.geometry, 0.005), 0.005, 'unit=sq_mile') /SDO_GEOM.SDO_AREA((geometry), 0.005, 'unit=sq_mile'))"Proportional Area"

 FROM DATA
 where r1.store_number != r1.store_number
 AND SDO_Relate(geometry,r1.geometry,'mask=anyinteract') = 'TRUE');
 End loop;
 End;