-71.57% is the change from 809 to 230
Calculation steps:
[( 230 - 809 ) ÷ 809] x 100 = -71.57%
Formula
Percentage change = [(230 - 809) / 809] x 100
Subtract the new number by the original number
230 - 809 = -579
-579 ÷ 809 = -0.715698393077874
-0.715698393077874 x 100 = -71.57%