How do you write 66 percent percent percent as a fraction in simplest form?

'66 perent percent percent ???

As 66 percent it is 66/100 = 66%

However as you have written 'percent' three times over'.

Then {[66/100]/100}/100

This becomes.

{[0.66]/100]/100}

{0.0066}/100

0.000066 or 6.6 x 10^(-5) ( which is a very tiny amount)!!!!