-89.4% is the change from 991 to 105
Calculation steps:
[( 105 - 991 ) ÷ 991] x 100 = -89.4%
Formula
Percentage change = [(105 - 991) / 991] x 100
Subtract the new number by the original number
105 - 991 = -886
-886 ÷ 991 = -0.8940464177598385
-0.8940464177598385 x 100 = -89.4%