‘M’, ‘N’, and ‘O’ initiated a partnership with investments of Rs. 22000, Rs. 18000, and Rs. 26000, respectively. A stipulation was that q% of the overall profit would be allocated for R&D, and the balance would be divided based on their investments. Assuming the profit for the year was Rs. 66000 and ‘N’ got Rs. 15000, determine ‘q’.