-52.85% is the change from 842 to 397
Calculation steps:
[( 397 - 842 ) ÷ 842] x 100 = -52.85%
Formula
Percentage change = [(397 - 842) / 842] x 100
Subtract the new number by the original number
397 - 842 = -445
-445 ÷ 842 = -0.5285035629453682
-0.5285035629453682 x 100 = -52.85%