What is ##1 2/3## written as a decimal and a percent?

We can indicate this as ##1.dot6 or 166 2/3%##
FIRST ##1 2/3## can be written as ##5/3##
This is how you can write it if you want it to come to a stop ##1.6666666666666666666666666666667##
but it does actually keep recurring to infinity.
We can indicate this as ##1.dot6##
SO now you want it to be expressed as a %.
Basically you can call it ##166.7##% (it is actually
##166.66666666666666666666666666667%)## but it would go on for ever.
A more accurate way of giving the percent is as ##166 2/3%##
This has not been rounded and is an exact amount.