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There are currently 327 million people in the U.S. That’s about 4% of the 7.7 billion people on earth. I find it extremely useful to remember these three numbers when I’m reading any other statistic. One fluid ounce is just under 30 mL, and if I could memorize that, I’d find it useful at the grocery store. So what…
What Numbers Should Everyone Memorize?
Source: Life Hacker
