The amount of pre-authorization can be found on the credit card online, and generally it will not be displayed immediately. The bank has its own bookkeeping date, which will be found the day after the pre-authorization at the earliest, and it will take 3 or 4 days later. If it is foreign pre-authorization, the time will be longer.
The bank's pre-sale right is not calculated according to the ratio of 100%. If you really need to know, you can find it on the credit card online and convert it yourself.