-9.45% is the change from 857 to 776
Calculation steps:
[( 776 - 857 ) ÷ 857] x 100 = -9.45%
Formula
Percentage change = [(776 - 857) / 857] x 100
Subtract the new number by the original number
776 - 857 = -81
-81 ÷ 857 = -0.09451575262543757
-0.09451575262543757 x 100 = -9.45%