-17.76% is the change from 850 to 699
Calculation steps:
[( 699 - 850 ) ÷ 850] x 100 = -17.76%
Formula
Percentage change = [(699 - 850) / 850] x 100
Subtract the new number by the original number
699 - 850 = -151
-151 ÷ 850 = -0.1776470588235294
-0.1776470588235294 x 100 = -17.76%