-93.83% is the change from 810 to 50
Calculation steps:
[( 50 - 810 ) ÷ 810] x 100 = -93.83%
Formula
Percentage change = [(50 - 810) / 810] x 100
Subtract the new number by the original number
50 - 810 = -760
-760 ÷ 810 = -0.9382716049382716
-0.9382716049382716 x 100 = -93.83%