-16.2% is the change from 500 to 419
Calculation steps:
[( 419 - 500 ) ÷ 500] x 100 = -16.2%
Formula
Percentage change = [(419 - 500) / 500] x 100
Subtract the new number by the original number
419 - 500 = -81
-81 ÷ 500 = -0.162
-0.162 x 100 = -16.2%