-85.86% is the change from 990 to 140
Calculation steps:
[( 140 - 990 ) ÷ 990] x 100 = -85.86%
Formula
Percentage change = [(140 - 990) / 990] x 100
Subtract the new number by the original number
140 - 990 = -850
-850 ÷ 990 = -0.8585858585858586
-0.8585858585858586 x 100 = -85.86%