-87.1% is the change from 496 to 64
Calculation steps:
[( 64 - 496 ) ÷ 496] x 100 = -87.1%
Formula
Percentage change = [(64 - 496) / 496] x 100
Subtract the new number by the original number
64 - 496 = -432
-432 ÷ 496 = -0.8709677419354839
-0.8709677419354839 x 100 = -87.1%