Answer: 1.5
Step-by-step explanation: 1.5 is correct because you have to do 0.6666... to the power of -1.
x^n=0.66666666^−1
=1/0.66666666^1
=1.500000015 which is rounded to 1.5. (Trust me 1.5 is correct.)
6 is incorrect because the other dude just did 2/3^-1 which did 2 divided by 3^-1, not 2/3 ^-1.
