-4.36% is the change from 665 to 636
Calculation steps:
[( 636 - 665 ) ÷ 665] x 100 = -4.36%
Formula
Percentage change = [(636 - 665) / 665] x 100
Subtract the new number by the original number
636 - 665 = -29
-29 ÷ 665 = -0.04360902255639098
-0.04360902255639098 x 100 = -4.36%