Ram discrepancies in Task Manager

[Raphalation]

I am a little confused about the memory usage stats that can be found in the task manager

imgur.com/Qvfihd9 http://

imgur.com/xEveqUR http://

As you can see from the second image, I have 8gb of ram installed in my system. However, in the first image, task manager seems to say that 47% of that is in use, even though the programs in the top of the list are only using around 3%. Unless there are hidden processes that are using the other 40% I really don't understand how almost half my memory is being used up while not even doing anything.

If anyone could help explain this to me, or if there is a possible fix to give me access to the memory that is being mysteriously used up, I would be very grateful.

-Raphalation

 

[SchizTech]

In the first image there's no one process using a large amount of RAM but there are many processes running. Twenty processes averaging two percent each comes out the same as two processes using twenty percent each. There are a fair number of Chrome windows evident; what happens if you close out of Chrome?

 

[Raphalation]

That did admittedly make quite a difference, I always forget how much memory chrome uses.
After closing down most of the active programs the memory usage drops to around 25%.

However, compare these updated images : http://imgur.com/OSY2YuZ , http://imgur.com/ctL9p4R
if you take razor synapse as an example, its uses close to 100mb of memory, which it also claims is 4%. Now with some basic mathematics (100/8000 * 100) it should only really be coming to around 1.5% (if I haven't blundered horrendously) Can you explain this?

 

[SchizTech]

Doing the math, 90.4MB/8192MB * 100% is 1.1%. However, if you take the percentage not as total RAM but out of used RAM the math works.

90.4MB/(.24*8192MB) * 100% is 4 and change percent.

I did the same comparison on my task manager in Win 10 TP with the same result

 

[SchizTech]

That is, the total percentage on top is a percentage of total but those for individual processes are out of the USED RAM.

 

[Raphalation]

I see, so if I were to add up all the processes it should come to 100% not 25%. I guess there is some logic behind that.
Im still quite surprised though how much memory my system uses up while not gaming. I got 8gb for the sole purpose of being able to play modern titles, but it seems it has almost become necessary for everyday use too.
Anyway, thanks for your help!