given that: Jamie works 40 hours in 5 days.
Then he works 8 hours per day.
total number of days to complete 308 hours is,
![(308)/(8)=38.5](https://img.qammunity.org/2023/formulas/mathematics/college/u4nwz9ilbgj0skuyvovxa6am4z6g3lzp9s.png)
No. of days per month is 30 days.
Therefore Jamie needs 1 month and 8.5 days to complete.
Therefore jamie needs is,
![(38.5)/(30)=1.28](https://img.qammunity.org/2023/formulas/mathematics/college/3ume19skypptz9ysvpcayemwsvliranam0.png)
Thus, Jamie needs 1.28 month to complete 308 hours