-0.94% is the change from 636 to 630
Calculation steps:
[( 630 - 636 ) ÷ 636] x 100 = -0.94%
Formula
Percentage change = [(630 - 636) / 636] x 100
Subtract the new number by the original number
630 - 636 = -6
-6 ÷ 636 = -0.009433962264150943
-0.009433962264150943 x 100 = -0.94%