-30.97% is the change from 636 to 439
Calculation steps:
[( 439 - 636 ) ÷ 636] x 100 = -30.97%
Formula
Percentage change = [(439 - 636) / 636] x 100
Subtract the new number by the original number
439 - 636 = -197
-197 ÷ 636 = -0.30974842767295596
-0.30974842767295596 x 100 = -30.97%