-81.03% is the change from 991 to 188
Calculation steps:
[( 188 - 991 ) ÷ 991] x 100 = -81.03%
Formula
Percentage change = [(188 - 991) / 991] x 100
Subtract the new number by the original number
188 - 991 = -803
-803 ÷ 991 = -0.8102926337033299
-0.8102926337033299 x 100 = -81.03%