1. Percents Practice Makes Perfect!

2. In 1999 there were 108,000,000 coffee consumers in the United States. If the US population was 272,690,813 in 1999, what percent of the US population were coffee consumers? Formula: Percent of  part/whole=percent 108,000,000/272,690,813= 0.3961 In 1999 39.61% of the US population were coffee consumers.

3. In 2009, there were 32,444,000 males and 26,655,000 females in the US that were never married. By what percent were the number of never-married males larger than never-married females? Percent change(difference) formula: (y2-y1)/y1 Y1: never married females Y2: never married males (32,444,000-26,655,000)/26,655,000= 0.2172 The number of never-married males was 21.72% larger than never-married females.

4. In 2009, there were 32,444,000 males and 26,655,000 females in the US that were never married. By what percent were the number of never-married females less than never-married males? Percent change(difference) formula: (y2-y1)/y1 Y1: never married males Y2: never married females (26,655,000-32,444,000)/32,444,000= 0.1784 The number of never-married females was 17.84% less than never-married males.

5. Percent change Percent larger/smaller By what percent greater/ less? What is the percent increase/decrease? Identify the direction of change (the change is from what value to what value) Y1: the reference/previous value Y2: the new/ different value Formula: (Y2-Y1)/Y1