A frequency table of grades has five classes (A, B, C, D, F) with frequencies of 4,11 ,15 ,7, and 1 respectively. Using percentages, what are the relative frequencies of the five classes?

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?