-52.2% is the change from 454 to 217
Calculation steps:
[( 217 - 454 ) ÷ 454] x 100 = -52.2%
Formula
Percentage change = [(217 - 454) / 454] x 100
Subtract the new number by the original number
217 - 454 = -237
-237 ÷ 454 = -0.5220264317180616
-0.5220264317180616 x 100 = -52.2%