-82.1% is the change from 1000 to 179
Calculation steps:
[( 179 - 1000 ) ÷ 1000] x 100 = -82.1%
Formula
Percentage change = [(179 - 1000) / 1000] x 100
Subtract the new number by the original number
179 - 1000 = -821
-821 ÷ 1000 = -0.821
-0.821 x 100 = -82.1%