Pi and e everywhere............68.27 %.................e starts out........2.7..................half of 68.27...%...is 34.1% and 34.1% when cut in half...........like 1/2........like the critical line.........like 2pi........like full circle on the unit circle................................two garbled pi's......

68–95–99.7 rule - Wikipedia

https://en.wikipedia.org/wiki/68–95–99.7_rule

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In statistics, the 68–95–99.7 rule is a shorthand used to remember the percentage of values that lie within a band around the mean in a normal distribution with a width of two, four and six standard deviations, respectively; more accurately, 68.27%, 95.45% and 99.73% of the values lie within one, two and three standard ...