About This Set
Every question here takes two steps: two readings turned into a percentage change or a ratio, or a share turned into an actual number before it is compared with anything. Most wrong answers in this set come from two places: a percentage change divided by the later value when it belongs on the earlier one, and two pie charts compared by their percentages when their totals differ (30% of 3,000 is more than 35% of 2,400). Allow 30 minutes; 19 or more correct means you are ready for the harder data in Practice Set 3.