Changing the values in percentage

I want to change the top values in percentage and tried through settings but when i put it in percentage i have this.

I am in postgresql.

SELECT COUNT(order_id),
date_trunc('hour', difference) +
(((date_part('minute', difference)::integer / 5::integer) * 5::integer)
|| ' minutes')::interval AS time
FROM test2

thats my code for the grouping every 5 minutes

Hi @louisc
You're just changing formatting.
If you want percentage, then you need to divide your count by the total amount.