-81.17% is the change from 478 to 90
Calculation steps:
[( 90 - 478 ) ÷ 478] x 100 = -81.17%
Formula
Percentage change = [(90 - 478) / 478] x 100
Subtract the new number by the original number
90 - 478 = -388
-388 ÷ 478 = -0.8117154811715481
-0.8117154811715481 x 100 = -81.17%