-1.26% is the change from 636 to 628
Calculation steps:
[( 628 - 636 ) ÷ 636] x 100 = -1.26%
Formula
Percentage change = [(628 - 636) / 636] x 100
Subtract the new number by the original number
628 - 636 = -8
-8 ÷ 636 = -0.012578616352201259
-0.012578616352201259 x 100 = -1.26%