-85% is the change from 1000 to 150
Calculation steps:
[( 150 - 1000 ) ÷ 1000] x 100 = -85%
Formula
Percentage change = [(150 - 1000) / 1000] x 100
Subtract the new number by the original number
150 - 1000 = -850
-850 ÷ 1000 = -0.85
-0.85 x 100 = -85%