-33.06% is the change from 605 to 405
Calculation steps:
[( 405 - 605 ) ÷ 605] x 100 = -33.06%
Formula
Percentage change = [(405 - 605) / 605] x 100
Subtract the new number by the original number
405 - 605 = -200
-200 ÷ 605 = -0.3305785123966942
-0.3305785123966942 x 100 = -33.06%