-96.21% is the change from 396 to 15
Calculation steps:
[( 15 - 396 ) ÷ 396] x 100 = -96.21%
Formula
Percentage change = [(15 - 396) / 396] x 100
Subtract the new number by the original number
15 - 396 = -381
-381 ÷ 396 = -0.9621212121212122
-0.9621212121212122 x 100 = -96.21%