-73.32% is the change from 506 to 135
Calculation steps:
[( 135 - 506 ) ÷ 506] x 100 = -73.32%
Formula
Percentage change = [(135 - 506) / 506] x 100
Subtract the new number by the original number
135 - 506 = -371
-371 ÷ 506 = -0.733201581027668
-0.733201581027668 x 100 = -73.32%