924.39% is the change from 82 to 840
Calculation steps:
[( 840 - 82 ) ÷ 82] x 100 = 924.39%
Formula
Percentage change = [(840 - 82) / 82] x 100
Subtract the new number by the original number
840 - 82 = 758
758 ÷ 82 = 9.24390243902439
9.24390243902439 x 100 = 924.39%