-29.52% is the change from 166 to 117
Calculation steps:
[( 117 - 166 ) ÷ 166] x 100 = -29.52%
Formula
Percentage change = [(117 - 166) / 166] x 100
Subtract the new number by the original number
117 - 166 = -49
-49 ÷ 166 = -0.29518072289156627
-0.29518072289156627 x 100 = -29.52%