-8.12% is the change from 850 to 781
Calculation steps:
[( 781 - 850 ) ÷ 850] x 100 = -8.12%
Formula
Percentage change = [(781 - 850) / 850] x 100
Subtract the new number by the original number
781 - 850 = -69
-69 ÷ 850 = -0.0811764705882353
-0.0811764705882353 x 100 = -8.12%