727.16% is the change from 81 to 670
Calculation steps:
[( 670 - 81 ) ÷ 81] x 100 = 727.16%
Formula
Percentage change = [(670 - 81) / 81] x 100
Subtract the new number by the original number
670 - 81 = 589
589 ÷ 81 = 7.271604938271605
7.271604938271605 x 100 = 727.16%