-8.71% is the change from 850 to 776
Calculation steps:
[( 776 - 850 ) ÷ 850] x 100 = -8.71%
Formula
Percentage change = [(776 - 850) / 850] x 100
Subtract the new number by the original number
776 - 850 = -74
-74 ÷ 850 = -0.08705882352941176
-0.08705882352941176 x 100 = -8.71%