-69.49% is the change from 508 to 155
Calculation steps:
[( 155 - 508 ) ÷ 508] x 100 = -69.49%
Formula
Percentage change = [(155 - 508) / 508] x 100
Subtract the new number by the original number
155 - 508 = -353
-353 ÷ 508 = -0.6948818897637795
-0.6948818897637795 x 100 = -69.49%