-73.43% is the change from 508 to 135
Calculation steps:
[( 135 - 508 ) ÷ 508] x 100 = -73.43%
Formula
Percentage change = [(135 - 508) / 508] x 100
Subtract the new number by the original number
135 - 508 = -373
-373 ÷ 508 = -0.734251968503937
-0.734251968503937 x 100 = -73.43%