-17.89% is the change from 475 to 390
Calculation steps:
[( 390 - 475 ) ÷ 475] x 100 = -17.89%
Formula
Percentage change = [(390 - 475) / 475] x 100
Subtract the new number by the original number
390 - 475 = -85
-85 ÷ 475 = -0.17894736842105263
-0.17894736842105263 x 100 = -17.89%