Nisha and Neelam start a business with initial investments of ₹p and ₹1.5p, respectively. After six months, Nisha increases her investment by 25% of her initial amount, and Pragya joins the business with an investment of ₹4000. After another six months (i.e., at the end of the first year), Nisha and Neelam reduce their investments by ₹1000 and ₹2000, respectively. At the end of two years, the profit share ratio between Pragya and Neelam is given as 15:q. Determine the value of p in terms of q.