-39.14% is the change from 810 to 493
Calculation steps:
[( 493 - 810 ) ÷ 810] x 100 = -39.14%
Formula
Percentage change = [(493 - 810) / 810] x 100
Subtract the new number by the original number
493 - 810 = -317
-317 ÷ 810 = -0.391358024691358
-0.391358024691358 x 100 = -39.14%