Yes, as per CBSE guidelines, your overall percentage will be calculated based on your top 5 subjects. If you have performed well in 5 subjects but have a low score in one subject, that low score will not affect your percentage unless it is included in the top 5 subjects that are calculated. To come out on top, focus on maximizing your scores in your strongest subjects and ensure consistent performance across all your subjects. The appropriate percentage will depend on your overall performance in the five subjects you select.