Calculating Percentages To calculate percentages, use the multiplication ( *) function and the percentage (%) function. For example, to determine the number that is 45 percent of 250, follow these steps: 1. Enter 250. The number 250 appears in the accumulator. 2. Enter * . 3. Enter 45. The number 45 appears in the accumulator. 4. Enter %. The result, 112.5, appears in the accumulator. Additional topics: * Entering Data from the Keyboard * Performing Arithmetic Functions * Calculating Square Roots * Clearing the Displays * Using Memory * Undoing the Most Recently Performed Function * Exiting Calculator * Using Calculator's Menus * Overview of Calculator