How does one mine a fraction of a bitcoin? I'm new to the whole bitcoin stuff.
The stuff I've read about mining so far told me that when a node in blockchain finally finds the correct nonce for a block that can be accepted in blockchain, it then advertises it to others and they verify and put the block to the blockchain (at least this is what i understood from the explainations). I have also read that prize for mining a block is 12.5 BTC. My question here is how do nodes mine a fraction of a bitcoin when mining?(shouldn't it be 12.5 BTC per mined block for each node? is it even possible?)


  Example: this


Answer to this question mentions 0.04 BTC,but how?
You either mine a full block...

-> Then you're free to take the full 12.5 BTC reward or less, at your choice.

Or..

-> You can mine with a pool. Everyone in that pool calculate hashes of trivial amounts, but their sum will be enough to mine blocks. Then, the pool will reward your work. (Search for PPS or PPLNS)