-69.1% is the change from 809 to 250
Calculation steps:
[( 250 - 809 ) ÷ 809] x 100 = -69.1%
Formula
Percentage change = [(250 - 809) / 809] x 100
Subtract the new number by the original number
250 - 809 = -559
-559 ÷ 809 = -0.6909765142150803
-0.6909765142150803 x 100 = -69.1%