-3.5% is the change from 628 to 606
Calculation steps:
[( 606 - 628 ) ÷ 628] x 100 = -3.5%
Formula
Percentage change = [(606 - 628) / 628] x 100
Subtract the new number by the original number
606 - 628 = -22
-22 ÷ 628 = -0.03503184713375796
-0.03503184713375796 x 100 = -3.5%