-79.77% is the change from 766 to 155
Calculation steps:
[( 155 - 766 ) ÷ 766] x 100 = -79.77%
Formula
Percentage change = [(155 - 766) / 766] x 100
Subtract the new number by the original number
155 - 766 = -611
-611 ÷ 766 = -0.7976501305483029
-0.7976501305483029 x 100 = -79.77%