A company is testing two different display features (A and B) on their website's homepage to determine which one leads to a higher conversion rate. During the experiment, they tracked the number of visitors who clicked on the "Sign Up" button and calculated the conversion rate for each version. The results are as follows:
● Version A: 500 visitors, 25 conversions
● Version B: 550 visitors, 40 conversions
Calculate the conversion rates for both Version A and Version B. Based on the results, which version had a higher conversion rate, and what is the approx percentage difference between the two conversion rates (in %)?