-96.12% is the change from 387 to 15
Calculation steps:
[( 15 - 387 ) ÷ 387] x 100 = -96.12%
Formula
Percentage change = [(15 - 387) / 387] x 100
Subtract the new number by the original number
15 - 387 = -372
-372 ÷ 387 = -0.9612403100775194
-0.9612403100775194 x 100 = -96.12%