-81.2% is the change from 1000 to 188
Calculation steps:
[( 188 - 1000 ) ÷ 1000] x 100 = -81.2%
Formula
Percentage change = [(188 - 1000) / 1000] x 100
Subtract the new number by the original number
188 - 1000 = -812
-812 ÷ 1000 = -0.812
-0.812 x 100 = -81.2%