-81.5% is the change from 1000 to 185
Calculation steps:
[( 185 - 1000 ) ÷ 1000] x 100 = -81.5%
Formula
Percentage change = [(185 - 1000) / 1000] x 100
Subtract the new number by the original number
185 - 1000 = -815
-815 ÷ 1000 = -0.815
-0.815 x 100 = -81.5%