-38.23% is the change from 531 to 328
Calculation steps:
[( 328 - 531 ) ÷ 531] x 100 = -38.23%
Formula
Percentage change = [(328 - 531) / 531] x 100
Subtract the new number by the original number
328 - 531 = -203
-203 ÷ 531 = -0.3822975517890772
-0.3822975517890772 x 100 = -38.23%