An appliance store manager noted that the sales of home appliances contributed 74% of the store's profits in the year 2010 and 82% in the year 2011.

Of the following choices, which statement about home appliance sales is true?

• Home appliance sales increased profits by 9.75 percentage points.
• Home appliance sales increased profits by 8%.
• Home appliance sales increased profits by 9.75%.
• Home appliance sales increased profits by 8 percentage points.