Answer:
12/15 of the way
Step-by-step explanation:
create a proportion of time/filled = time/filled
let 'x' = fractional portion of filled pool
1/2÷1/15 = 6÷x
complex fraction 1/2÷1/15 is the same as 1/2 × 15/1 and this is 15/2
15/2 = 6/x
cross-multiply to get:
15x = 12
x = 12/15
