-39.92% is the change from 531 to 319
Calculation steps:
[( 319 - 531 ) ÷ 531] x 100 = -39.92%
Formula
Percentage change = [(319 - 531) / 531] x 100
Subtract the new number by the original number
319 - 531 = -212
-212 ÷ 531 = -0.3992467043314501
-0.3992467043314501 x 100 = -39.92%