-25.56% is the change from 810 to 603
Calculation steps:
[( 603 - 810 ) ÷ 810] x 100 = -25.56%
Formula
Percentage change = [(603 - 810) / 810] x 100
Subtract the new number by the original number
603 - 810 = -207
-207 ÷ 810 = -0.25555555555555554
-0.25555555555555554 x 100 = -25.56%