-51.2% is the change from 920 to 449
Calculation steps:
[( 449 - 920 ) ÷ 920] x 100 = -51.2%
Formula
Percentage change = [(449 - 920) / 920] x 100
Subtract the new number by the original number
449 - 920 = -471
-471 ÷ 920 = -0.5119565217391304
-0.5119565217391304 x 100 = -51.2%