-4.18% is the change from 646 to 619
Calculation steps:
[( 619 - 646 ) ÷ 646] x 100 = -4.18%
Formula
Percentage change = [(619 - 646) / 646] x 100
Subtract the new number by the original number
619 - 646 = -27
-27 ÷ 646 = -0.04179566563467492
-0.04179566563467492 x 100 = -4.18%