-3.39% is the change from 649 to 627
Calculation steps:
[( 627 - 649 ) ÷ 649] x 100 = -3.39%
Formula
Percentage change = [(627 - 649) / 649] x 100
Subtract the new number by the original number
627 - 649 = -22
-22 ÷ 649 = -0.03389830508474576
-0.03389830508474576 x 100 = -3.39%