-51.9% is the change from 447 to 215
Calculation steps:
[( 215 - 447 ) ÷ 447] x 100 = -51.9%
Formula
Percentage change = [(215 - 447) / 447] x 100
Subtract the new number by the original number
215 - 447 = -232
-232 ÷ 447 = -0.5190156599552572
-0.5190156599552572 x 100 = -51.9%