-9.76% is the change from 850 to 767
Calculation steps:
[( 767 - 850 ) ÷ 850] x 100 = -9.76%
Formula
Percentage change = [(767 - 850) / 850] x 100
Subtract the new number by the original number
767 - 850 = -83
-83 ÷ 850 = -0.0976470588235294
-0.0976470588235294 x 100 = -9.76%