-50.7% is the change from 852 to 420
Calculation steps:
[( 420 - 852 ) ÷ 852] x 100 = -50.7%
Formula
Percentage change = [(420 - 852) / 852] x 100
Subtract the new number by the original number
420 - 852 = -432
-432 ÷ 852 = -0.5070422535211268
-0.5070422535211268 x 100 = -50.7%