That number is depressing at first sight, and if you chart it you find that in the previous decade it has increased about 10% - in raw terms.
But if you want the "glass half full" view - zoom out even further and chart further back into history and measure proportion of global population in absolute povery, poverty, living on $1.25 or less (adjusted) per day, and you get charts like this:
http://s3.amazonaws.com/content.washingtonexaminer.biz/web-p...
and individual cases like China, which are just amazing:
http://iresearch.worldbank.org/PovcalNet/images/ChinaSpecial...
and you're more hopeful that we'll solve global hunger and poverty in our lifetimes.
It wasn't redistribution that caused it - on the contrary the evidence is that previously planned economies opening up reversed their fortunes (no co-incidence on where that China chart begins to show progress).
The major international aid orgs now almost entirely agree that food aid and humanitarian action should be short-term and a stop gap. The solutions are in trade, access to credit, access to markets, food engineering and sustainability, education, empowering the entire population (ie. no sexism, racism, etc.) political stability, etc. [0][1]
It's why I completely agree with grandparent OP that the "division" performed is misleading - the economy isn't a fixed size nor is the distribution zero-summed. We can lift the rest of the world up to our level rather than meeting in the middle.
[0] https://www.wfp.org/stories/10-ways-feed-world
[1] http://borgenproject.org/10-ways-stop-world-hunger/