-8.3% is the change from 855 to 784
Calculation steps:
[( 784 - 855 ) ÷ 855] x 100 = -8.3%
Formula
Percentage change = [(784 - 855) / 855] x 100
Subtract the new number by the original number
784 - 855 = -71
-71 ÷ 855 = -0.08304093567251462
-0.08304093567251462 x 100 = -8.3%