-84.4% is the change from 1000 to 156
Calculation steps:
[( 156 - 1000 ) ÷ 1000] x 100 = -84.4%
Formula
Percentage change = [(156 - 1000) / 1000] x 100
Subtract the new number by the original number
156 - 1000 = -844
-844 ÷ 1000 = -0.844
-0.844 x 100 = -84.4%