-6.8% is the change from 500 to 466
Calculation steps:
[( 466 - 500 ) ÷ 500] x 100 = -6.8%
Formula
Percentage change = [(466 - 500) / 500] x 100
Subtract the new number by the original number
466 - 500 = -34
-34 ÷ 500 = -0.068
-0.068 x 100 = -6.8%
Example