-81.82% is the change from 913 to 166
Calculation steps:
[( 166 - 913 ) ÷ 913] x 100 = -81.82%
Formula
Percentage change = [(166 - 913) / 913] x 100
Subtract the new number by the original number
166 - 913 = -747
-747 ÷ 913 = -0.8181818181818182
-0.8181818181818182 x 100 = -81.82%