You don't need to worry about percentile with these sections because these sections score will not be added to your final score. So if you wish you can avoid these section to save time and utilize the time in solving the verbal ability, data interpretation and logical reasoning sections.

This section is moreover like a default section. If you don't attempt any question there will be no problem and you will be given a separate percentile for this section. It might not be gonna be part of your final percentile but still, you will be asked its core during an interview so it's better to get some score rather than being at zero scores.

if you are interested to attempt these sections go through the current affairs. The question paper will contain different aspects of the economy and check out different award winners etc.

All the best!!