-86.72% is the change from 399 to 53
Calculation steps:
[( 53 - 399 ) ÷ 399] x 100 = -86.72%
Formula
Percentage change = [(53 - 399) / 399] x 100
Subtract the new number by the original number
53 - 399 = -346
-346 ÷ 399 = -0.8671679197994987
-0.8671679197994987 x 100 = -86.72%