-93.2% is the change from 500 to 34
Calculation steps:
[( 34 - 500 ) ÷ 500] x 100 = -93.2%
Formula
Percentage change = [(34 - 500) / 500] x 100
Subtract the new number by the original number
34 - 500 = -466
-466 ÷ 500 = -0.932
-0.932 x 100 = -93.2%
Example