-0.25% is the change from 809 to 807
Calculation steps:
[( 807 - 809 ) ÷ 809] x 100 = -0.25%
Formula
Percentage change = [(807 - 809) / 809] x 100
Subtract the new number by the original number
807 - 809 = -2
-2 ÷ 809 = -0.002472187886279357
-0.002472187886279357 x 100 = -0.25%