Question Abnormal Memory Usage

Aug 12, 2019
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I have 16(2x8) GB of RAM, everytime i check Task Manager or Process Explorer Apps my memory usage always >80% usage even my computer on idle condition.
https://ibb.co/mypK1Ty

This memory usage does not make any sense to me. for example when i check the resource value of Google Chrome, the memory usage value is 738.6 MB but when i check in pecentage it shows 40%. Then i check the memory performance tab and it show 16 GB of RAM installed. any idea why?