-54.4% is the change from 511 to 233
Calculation steps:
[( 233 - 511 ) ÷ 511] x 100 = -54.4%
Formula
Percentage change = [(233 - 511) / 511] x 100
Subtract the new number by the original number
233 - 511 = -278
-278 ÷ 511 = -0.5440313111545988
-0.5440313111545988 x 100 = -54.4%