-50.86% is the change from 810 to 398
Calculation steps:
[( 398 - 810 ) ÷ 810] x 100 = -50.86%
Formula
Percentage change = [(398 - 810) / 810] x 100
Subtract the new number by the original number
398 - 810 = -412
-412 ÷ 810 = -0.508641975308642
-0.508641975308642 x 100 = -50.86%