Express:
20seconds as a fraction of a 1 minute.
Since, 1minute=60seconds.
Therefore, the fractional representation of 20 seconds with respect to 60seconds can be written as 2060 or 13(dividing numerator and denominator by 20).
Thus, 20seconds as a fraction of 1 minute =13.
A time interval of 3 minutes and 20 seconds is wrongly measured as 3 minutes and 25 seconds. What is the percentage error?