-37.89% is the change from 855 to 531
Calculation steps:
[( 531 - 855 ) ÷ 855] x 100 = -37.89%
Formula
Percentage change = [(531 - 855) / 855] x 100
Subtract the new number by the original number
531 - 855 = -324
-324 ÷ 855 = -0.37894736842105264
-0.37894736842105264 x 100 = -37.89%