-77.68% is the change from 766 to 171
Calculation steps:
[( 171 - 766 ) ÷ 766] x 100 = -77.68%
Formula
Percentage change = [(171 - 766) / 766] x 100
Subtract the new number by the original number
171 - 766 = -595
-595 ÷ 766 = -0.7767624020887729
-0.7767624020887729 x 100 = -77.68%