-51.33% is the change from 450 to 219
Calculation steps:
[( 219 - 450 ) ÷ 450] x 100 = -51.33%
Formula
Percentage change = [(219 - 450) / 450] x 100
Subtract the new number by the original number
219 - 450 = -231
-231 ÷ 450 = -0.5133333333333333
-0.5133333333333333 x 100 = -51.33%