-51.09% is the change from 920 to 450
Calculation steps:
[( 450 - 920 ) ÷ 920] x 100 = -51.09%
Formula
Percentage change = [(450 - 920) / 920] x 100
Subtract the new number by the original number
450 - 920 = -470
-470 ÷ 920 = -0.5108695652173914
-0.5108695652173914 x 100 = -51.09%