How to find out the ratio of 2 weeks to 4 hours in their simplest form

Dear student,

And, 1 week= 7 days, 
Therefore 2 weeks= $2\times 7 days= 14 days$
Now, If 1 day = 24 hours,
Then 14 days will be equal to $14\times 24 hours=336 hours$
The ratio of 336 hours to 4 hours is $\frac{336}{4}=82:1$
Hope this information has solved your queries.
Regards