820% is the change from 100 to 920
Calculation steps:
[( 920 - 100 ) ÷ 100] x 100 = 820%
Formula
Percentage change = [(920 - 100) / 100] x 100
Subtract the new number by the original number
920 - 100 = 820
820 ÷ 100 = 8.2
8.2 x 100 = 820%
Example