A marketing team at a software company is evaluating their lead nurturing strategies to improve conversion rates. They have identified three primary channels for nurturing leads: email campaigns, social media engagement, and personalized content delivery. After analyzing their past campaigns, they found that leads nurtured through personalized content had a 25% higher conversion rate compared to those nurtured through email campaigns, which had a 15% conversion rate. If the team decides to allocate 60% of their nurturing budget to personalized content, 30% to email campaigns, and 10% to social media, what is the expected increase in overall conversion rate if they manage to maintain the same conversion rates for each channel?