-3.71% is the change from 809 to 779
Calculation steps:
[( 779 - 809 ) ÷ 809] x 100 = -3.71%
Formula
Percentage change = [(779 - 809) / 809] x 100
Subtract the new number by the original number
779 - 809 = -30
-30 ÷ 809 = -0.037082818294190356
-0.037082818294190356 x 100 = -3.71%