-94.57% is the change from 387 to 21
Calculation steps:
[( 21 - 387 ) ÷ 387] x 100 = -94.57%
Formula
Percentage change = [(21 - 387) / 387] x 100
Subtract the new number by the original number
21 - 387 = -366
-366 ÷ 387 = -0.9457364341085271
-0.9457364341085271 x 100 = -94.57%