-40.74% is the change from 810 to 480
Calculation steps:
[( 480 - 810 ) ÷ 810] x 100 = -40.74%
Formula
Percentage change = [(480 - 810) / 810] x 100
Subtract the new number by the original number
480 - 810 = -330
-330 ÷ 810 = -0.4074074074074074
-0.4074074074074074 x 100 = -40.74%