-80.08% is the change from 778 to 155
Calculation steps:
[( 155 - 778 ) ÷ 778] x 100 = -80.08%
Formula
Percentage change = [(155 - 778) / 778] x 100
Subtract the new number by the original number
155 - 778 = -623
-623 ÷ 778 = -0.800771208226221
-0.800771208226221 x 100 = -80.08%