Answer:
He has worked 30 hours.
Step-by-step explanation:
Given that Craig has completed 75% of 40 hours. So in order to find how many hours he has completed, you have to divide it by 100 and multiply by 40 :
[tex] \frac{75}{100} \times 40[/tex]
[tex] = \frac{3}{4} \times 40[/tex]
[tex] = 3 \times 10[/tex]
[tex] = 30 \: hours[/tex]
