Percentage Increase Needed for Lowest Sales Department

A regional grocery store chain analyzed its sales data over the last year to assess the performance of its various departments. The following data was collected:

• Produce Department: $600,000 in sales
• Dairy Department: $350,000 in sales
• Bakery Department: $420,000 in sales
• Meat Department: $540,000 in sales
• Frozen Foods Department: $290,000 in sales

Based on this data, the chain's management wants to focus its marketing efforts on maximizing profits from specific departments. If they aim to increase total sales to $2,500,000, what percentage increase in sales is needed from the department with the lowest sales?