In business, percents are frequently used to represent the portion of observations falling within classes of a frequency distribution. A relative frequency distribution expresses the distribution as percents. To convert a frequency distribution to a relative frequency distribution, divide each of the class frequencies (portion) by the total number of observations (base). Remember, rate = portion base. Round your answers to tenths. (a) From the frequency distribution of sales receipts for an internet cafe, convert each class frequency to a relative class frequency, percents. (b) What percent of the sales receipts were paid between $5.00 and $5.99 ? % (c) What percent of the sales receipts were $7.00 or more? % (d) What percent of the sales receipts were less than $8.00 ? %