-79.06% is the change from 850 to 178
Calculation steps:
[( 178 - 850 ) ÷ 850] x 100 = -79.06%
Formula
Percentage change = [(178 - 850) / 850] x 100
Subtract the new number by the original number
178 - 850 = -672
-672 ÷ 850 = -0.7905882352941176
-0.7905882352941176 x 100 = -79.06%