-77.21% is the change from 680 to 155
Calculation steps:
[( 155 - 680 ) ÷ 680] x 100 = -77.21%
Formula
Percentage change = [(155 - 680) / 680] x 100
Subtract the new number by the original number
155 - 680 = -525
-525 ÷ 680 = -0.7720588235294118
-0.7720588235294118 x 100 = -77.21%