Calculate the relative uncertainty.

Question

Give the relative uncertainty required in a clock which is put right at noon on Sunday, and by the following Sunday noon must have an error of no more than 5seconds. Give your answer as a percentage.

Answer 1

I believe you are looking for 100 (5 seconds)/ 1 week as the uncertainty. You have to express 1 week in seconds and then do the division. Relative error is usually given in percent. If you don't need that, then don't multiply by 100.