-4.18% is the change from 407 to 390
Calculation steps:
[( 390 - 407 ) ÷ 407] x 100 = -4.18%
Formula
Percentage change = [(390 - 407) / 407] x 100
Subtract the new number by the original number
390 - 407 = -17
-17 ÷ 407 = -0.04176904176904177
-0.04176904176904177 x 100 = -4.18%