That would be one third. 1/3
What is one-half of two-thirds?
do you mean 2/3 divided by 1/2?
same as,
2/3 * 2/1
= 4/3
======Assuming that is what you meant.
One half of my shine jug
"of" means "multiply" [and "is" means "equal] 1/2 of 2/3 is (1/2) X (2/3) = (is) 1/3