-32.72% is the change from 810 to 545
Calculation steps:
[( 545 - 810 ) ÷ 810] x 100 = -32.72%
Formula
Percentage change = [(545 - 810) / 810] x 100
Subtract the new number by the original number
545 - 810 = -265
-265 ÷ 810 = -0.3271604938271605
-0.3271604938271605 x 100 = -32.72%