-9.37% is the change from 939 to 851
Calculation steps:
[( 851 - 939 ) ÷ 939] x 100 = -9.37%
Formula
Percentage change = [(851 - 939) / 939] x 100
Subtract the new number by the original number
851 - 939 = -88
-88 ÷ 939 = -0.09371671991480299
-0.09371671991480299 x 100 = -9.37%