-19.59% is the change from 485 to 390
Calculation steps:
[( 390 - 485 ) ÷ 485] x 100 = -19.59%
Formula
Percentage change = [(390 - 485) / 485] x 100
Subtract the new number by the original number
390 - 485 = -95
-95 ÷ 485 = -0.1958762886597938
-0.1958762886597938 x 100 = -19.59%