-83.67% is the change from 496 to 81
Calculation steps:
[( 81 - 496 ) ÷ 496] x 100 = -83.67%
Formula
Percentage change = [(81 - 496) / 496] x 100
Subtract the new number by the original number
81 - 496 = -415
-415 ÷ 496 = -0.8366935483870968
-0.8366935483870968 x 100 = -83.67%