-83.6% is the change from 1000 to 164
Calculation steps:
[( 164 - 1000 ) ÷ 1000] x 100 = -83.6%
Formula
Percentage change = [(164 - 1000) / 1000] x 100
Subtract the new number by the original number
164 - 1000 = -836
-836 ÷ 1000 = -0.836
-0.836 x 100 = -83.6%