-73.23% is the change from 508 to 136
Calculation steps:
[( 136 - 508 ) ÷ 508] x 100 = -73.23%
Formula
Percentage change = [(136 - 508) / 508] x 100
Subtract the new number by the original number
136 - 508 = -372
-372 ÷ 508 = -0.7322834645669292
-0.7322834645669292 x 100 = -73.23%