-0.79% is the change from 636 to 631
Calculation steps:
[( 631 - 636 ) ÷ 636] x 100 = -0.79%
Formula
Percentage change = [(631 - 636) / 636] x 100
Subtract the new number by the original number
631 - 636 = -5
-5 ÷ 636 = -0.007861635220125786
-0.007861635220125786 x 100 = -0.79%