-68.89% is the change from 810 to 252
Calculation steps:
[( 252 - 810 ) ÷ 810] x 100 = -68.89%
Formula
Percentage change = [(252 - 810) / 810] x 100
Subtract the new number by the original number
252 - 810 = -558
-558 ÷ 810 = -0.6888888888888889
-0.6888888888888889 x 100 = -68.89%