-62.3% is the change from 809 to 305
Calculation steps:
[( 305 - 809 ) ÷ 809] x 100 = -62.3%
Formula
Percentage change = [(305 - 809) / 809] x 100
Subtract the new number by the original number
305 - 809 = -504
-504 ÷ 809 = -0.622991347342398
-0.622991347342398 x 100 = -62.3%