-90.12% is the change from 506 to 50
Calculation steps:
[( 50 - 506 ) ÷ 506] x 100 = -90.12%
Formula
Percentage change = [(50 - 506) / 506] x 100
Subtract the new number by the original number
50 - 506 = -456
-456 ÷ 506 = -0.9011857707509882
-0.9011857707509882 x 100 = -90.12%