"Pawan" and "Qureshi" start a business by investing Rs. 'p' and Rs. 'q', respectively. After the first 6 months, "Pawan" raises his investment by 25%, while "Qureshi" lowers his investment by 33.33%. After another 6 months, "Pawan" reduces his investment by 40%, and "Qureshi" boosts his investment by 50%. By the end of 24 months, their profit-sharing ratio stands at 9:11. Determine the ratio of "Qureshi's" initial investment to "Pawan's".