-50.69% is the change from 436 to 215
Calculation steps:
[( 215 - 436 ) ÷ 436] x 100 = -50.69%
Formula
Percentage change = [(215 - 436) / 436] x 100
Subtract the new number by the original number
215 - 436 = -221
-221 ÷ 436 = -0.5068807339449541
-0.5068807339449541 x 100 = -50.69%