10162.5% is the change from 8 to 821
Calculation steps:
[( 821 - 8 ) ÷ 8] x 100 = 10162.5%
Formula
Percentage change = [(821 - 8) / 8] x 100
Subtract the new number by the original number
821 - 8 = 813
813 ÷ 8 = 101.625
101.625 x 100 = 10162.5%
Example