-51.08% is the change from 930 to 455
Calculation steps:
[( 455 - 930 ) ÷ 930] x 100 = -51.08%
Formula
Percentage change = [(455 - 930) / 930] x 100
Subtract the new number by the original number
455 - 930 = -475
-475 ÷ 930 = -0.510752688172043
-0.510752688172043 x 100 = -51.08%