-14.5% is the change from 1000 to 855
Calculation steps:
[( 855 - 1000 ) ÷ 1000] x 100 = -14.5%
Formula
Percentage change = [(855 - 1000) / 1000] x 100
Subtract the new number by the original number
855 - 1000 = -145
-145 ÷ 1000 = -0.145
-0.145 x 100 = -14.5%