-47.02% is the change from 840 to 445
Calculation steps:
[( 445 - 840 ) ÷ 840] x 100 = -47.02%
Formula
Percentage change = [(445 - 840) / 840] x 100
Subtract the new number by the original number
445 - 840 = -395
-395 ÷ 840 = -0.47023809523809523
-0.47023809523809523 x 100 = -47.02%