-2.73% is the change from 623 to 606
Calculation steps:
[( 606 - 623 ) ÷ 623] x 100 = -2.73%
Formula
Percentage change = [(606 - 623) / 623] x 100
Subtract the new number by the original number
606 - 623 = -17
-17 ÷ 623 = -0.027287319422150885
-0.027287319422150885 x 100 = -2.73%