-93.81% is the change from 485 to 30
Calculation steps:
[( 30 - 485 ) ÷ 485] x 100 = -93.81%
Formula
Percentage change = [(30 - 485) / 485] x 100
Subtract the new number by the original number
30 - 485 = -455
-455 ÷ 485 = -0.9381443298969072
-0.9381443298969072 x 100 = -93.81%