-44.57% is the change from 819 to 454
Calculation steps:
[( 454 - 819 ) ÷ 819] x 100 = -44.57%
Formula
Percentage change = [(454 - 819) / 819] x 100
Subtract the new number by the original number
454 - 819 = -365
-365 ÷ 819 = -0.4456654456654457
-0.4456654456654457 x 100 = -44.57%