-3.09% is the change from 809 to 784
Calculation steps:
[( 784 - 809 ) ÷ 809] x 100 = -3.09%
Formula
Percentage change = [(784 - 809) / 809] x 100
Subtract the new number by the original number
784 - 809 = -25
-25 ÷ 809 = -0.030902348578491966
-0.030902348578491966 x 100 = -3.09%