-66.73% is the change from 499 to 166
Calculation steps:
[( 166 - 499 ) ÷ 499] x 100 = -66.73%
Formula
Percentage change = [(166 - 499) / 499] x 100
Subtract the new number by the original number
166 - 499 = -333
-333 ÷ 499 = -0.6673346693386774
-0.6673346693386774 x 100 = -66.73%