-81.8% is the change from 478 to 87
Calculation steps:
[( 87 - 478 ) ÷ 478] x 100 = -81.8%
Formula
Percentage change = [(87 - 478) / 478] x 100
Subtract the new number by the original number
87 - 478 = -391
-391 ÷ 478 = -0.8179916317991632
-0.8179916317991632 x 100 = -81.8%