If you would like to know what is the percent of change between the years 1986 and 2007, you can calculate this using the following steps:
x% of $0.93 is $2.77
x% * 0.93 = 2.77
x/100 * 0.93 = 2.77 /*100
x * 0.93 = 2.77 * 100 /0.93
x = 2.77 * 100 / 0.93
x = 297.85 %
297.85% - 100% = 197.85%
Result: The change is 197.85%.