-42% is the change from 531 to 308
Calculation steps:
[( 308 - 531 ) ÷ 531] x 100 = -42%
Formula
Percentage change = [(308 - 531) / 531] x 100
Subtract the new number by the original number
308 - 531 = -223
-223 ÷ 531 = -0.4199623352165725
-0.4199623352165725 x 100 = -42%