-36.79% is the change from 511 to 323
Calculation steps:
[( 323 - 511 ) ÷ 511] x 100 = -36.79%
Formula
Percentage change = [(323 - 511) / 511] x 100
Subtract the new number by the original number
323 - 511 = -188
-188 ÷ 511 = -0.3679060665362035
-0.3679060665362035 x 100 = -36.79%