-89.69% is the change from 485 to 50
Calculation steps:
[( 50 - 485 ) ÷ 485] x 100 = -89.69%
Formula
Percentage change = [(50 - 485) / 485] x 100
Subtract the new number by the original number
50 - 485 = -435
-435 ÷ 485 = -0.8969072164948454
-0.8969072164948454 x 100 = -89.69%