-51.47% is the change from 818 to 397
Calculation steps:
[( 397 - 818 ) ÷ 818] x 100 = -51.47%
Formula
Percentage change = [(397 - 818) / 818] x 100
Subtract the new number by the original number
397 - 818 = -421
-421 ÷ 818 = -0.5146699266503667
-0.5146699266503667 x 100 = -51.47%