-7.88% is the change from 850 to 783
Calculation steps:
[( 783 - 850 ) ÷ 850] x 100 = -7.88%
Formula
Percentage change = [(783 - 850) / 850] x 100
Subtract the new number by the original number
783 - 850 = -67
-67 ÷ 850 = -0.07882352941176471
-0.07882352941176471 x 100 = -7.88%