-90.07% is the change from 916 to 91
Calculation steps:
[( 91 - 916 ) ÷ 916] x 100 = -90.07%
Formula
Percentage change = [(91 - 916) / 916] x 100
Subtract the new number by the original number
91 - 916 = -825
-825 ÷ 916 = -0.9006550218340611
-0.9006550218340611 x 100 = -90.07%