-90.14% is the change from 507 to 50
Calculation steps:
[( 50 - 507 ) ÷ 507] x 100 = -90.14%
Formula
Percentage change = [(50 - 507) / 507] x 100
Subtract the new number by the original number
50 - 507 = -457
-457 ÷ 507 = -0.9013806706114399
-0.9013806706114399 x 100 = -90.14%