-84.96% is the change from 991 to 149
Calculation steps:
[( 149 - 991 ) ÷ 991] x 100 = -84.96%
Formula
Percentage change = [(149 - 991) / 991] x 100
Subtract the new number by the original number
149 - 991 = -842
-842 ÷ 991 = -0.8496468213925328
-0.8496468213925328 x 100 = -84.96%