-8.42% is the change from 855 to 783
Calculation steps:
[( 783 - 855 ) ÷ 855] x 100 = -8.42%
Formula
Percentage change = [(783 - 855) / 855] x 100
Subtract the new number by the original number
783 - 855 = -72
-72 ÷ 855 = -0.08421052631578947
-0.08421052631578947 x 100 = -8.42%