-51.03% is the change from 919 to 450
Calculation steps:
[( 450 - 919 ) ÷ 919] x 100 = -51.03%
Formula
Percentage change = [(450 - 919) / 919] x 100
Subtract the new number by the original number
450 - 919 = -469
-469 ÷ 919 = -0.5103373231773667
-0.5103373231773667 x 100 = -51.03%