-81.2% is the change from 500 to 94
Calculation steps:
[( 94 - 500 ) ÷ 500] x 100 = -81.2%
Formula
Percentage change = [(94 - 500) / 500] x 100
Subtract the new number by the original number
94 - 500 = -406
-406 ÷ 500 = -0.812
-0.812 x 100 = -81.2%
Example