-50.81% is the change from 807 to 397
Calculation steps:
[( 397 - 807 ) ÷ 807] x 100 = -50.81%
Formula
Percentage change = [(397 - 807) / 807] x 100
Subtract the new number by the original number
397 - 807 = -410
-410 ÷ 807 = -0.5080545229244114
-0.5080545229244114 x 100 = -50.81%