-93.71% is the change from 636 to 40
Calculation steps:
[( 40 - 636 ) ÷ 636] x 100 = -93.71%
Formula
Percentage change = [(40 - 636) / 636] x 100
Subtract the new number by the original number
40 - 636 = -596
-596 ÷ 636 = -0.9371069182389937
-0.9371069182389937 x 100 = -93.71%