845.68% is the change from 81 to 766
Calculation steps:
[( 766 - 81 ) ÷ 81] x 100 = 845.68%
Formula
Percentage change = [(766 - 81) / 81] x 100
Subtract the new number by the original number
766 - 81 = 685
685 ÷ 81 = 8.45679012345679
8.45679012345679 x 100 = 845.68%