840.24% is the change from 82 to 771
Calculation steps:
[( 771 - 82 ) ÷ 82] x 100 = 840.24%
Formula
Percentage change = [(771 - 82) / 82] x 100
Subtract the new number by the original number
771 - 82 = 689
689 ÷ 82 = 8.402439024390244
8.402439024390244 x 100 = 840.24%