What is the answer to the following using sicentific calculator

64-1/6

why would you need a scientific calculator, or even a simple calculator ?

64 - 1/6 = 63 5/6

if you meant 64^(-1/6)
then
= 1/64^(1/6) = 1/2 , no calculator needed.

if you insist on using a calculator ...

64
yx
(
1
÷
6 ±
)
=

to get .5 which is 1/2