-79.5% is the change from 766 to 157
Calculation steps:
[( 157 - 766 ) ÷ 766] x 100 = -79.5%
Formula
Percentage change = [(157 - 766) / 766] x 100
Subtract the new number by the original number
157 - 766 = -609
-609 ÷ 766 = -0.7950391644908616
-0.7950391644908616 x 100 = -79.5%