Interpretation of the frequency distribution table can be easier or clearer when we use the percentage of the frequency. Percentage representation of frequency can also be displayed in the frequency distribution table. Percentage of frequency is called the relative frequency and the table is called relative frequency distribution table. Relative frequency can be used for both quantitative and qualitative variables. The relative frequency for a class is calculated as follows: Relative Frequency = fi/ n where, fi is the frequency for class i and n is the sample size. In this case, fi is 21and n is 85. The percentage of relative frequency is 24,7.