-66.4% is the change from 494 to 166
Calculation steps:
[( 166 - 494 ) ÷ 494] x 100 = -66.4%
Formula
Percentage change = [(166 - 494) / 494] x 100
Subtract the new number by the original number
166 - 494 = -328
-328 ÷ 494 = -0.6639676113360324
-0.6639676113360324 x 100 = -66.4%