-91.84% is the change from 478 to 39
Calculation steps:
[( 39 - 478 ) ÷ 478] x 100 = -91.84%
Formula
Percentage change = [(39 - 478) / 478] x 100
Subtract the new number by the original number
39 - 478 = -439
-439 ÷ 478 = -0.9184100418410042
-0.9184100418410042 x 100 = -91.84%