-90.72% is the change from 981 to 91
Calculation steps:
[( 91 - 981 ) ÷ 981] x 100 = -90.72%
Formula
Percentage change = [(91 - 981) / 981] x 100
Subtract the new number by the original number
91 - 981 = -890
-890 ÷ 981 = -0.9072375127420998
-0.9072375127420998 x 100 = -90.72%