Revenue Contribution of Product B After Increase

A company sells two types of products, A and B. Last month, the company reported that total revenue from product A was $20,000, which accounted for 80% of the total revenue from both products. Product B, therefore, accounted for the remaining revenue. If the revenue from product B increased by 25% this month compared to last month, what percentage of the total revenue from both products this month comes from product B?