-33.46% is the change from 810 to 539
Calculation steps:
[( 539 - 810 ) ÷ 810] x 100 = -33.46%
Formula
Percentage change = [(539 - 810) / 810] x 100
Subtract the new number by the original number
539 - 810 = -271
-271 ÷ 810 = -0.3345679012345679
-0.3345679012345679 x 100 = -33.46%