-96.73% is the change from 397 to 13
Calculation steps:
[( 13 - 397 ) ÷ 397] x 100 = -96.73%
Formula
Percentage change = [(13 - 397) / 397] x 100
Subtract the new number by the original number
13 - 397 = -384
-384 ÷ 397 = -0.9672544080604534
-0.9672544080604534 x 100 = -96.73%