-80.1% is the change from 779 to 155
Calculation steps:
[( 155 - 779 ) ÷ 779] x 100 = -80.1%
Formula
Percentage change = [(155 - 779) / 779] x 100
Subtract the new number by the original number
155 - 779 = -624
-624 ÷ 779 = -0.8010269576379975
-0.8010269576379975 x 100 = -80.1%