-37.21% is the change from 809 to 508
Calculation steps:
[( 508 - 809 ) ÷ 809] x 100 = -37.21%
Formula
Percentage change = [(508 - 809) / 809] x 100
Subtract the new number by the original number
508 - 809 = -301
-301 ÷ 809 = -0.3720642768850433
-0.3720642768850433 x 100 = -37.21%