-33.68% is the change from 487 to 323
Calculation steps:
[( 323 - 487 ) ÷ 487] x 100 = -33.68%
Formula
Percentage change = [(323 - 487) / 487] x 100
Subtract the new number by the original number
323 - 487 = -164
-164 ÷ 487 = -0.33675564681724846
-0.33675564681724846 x 100 = -33.68%