-95.1% is the change from 816 to 40
Calculation steps:
[( 40 - 816 ) ÷ 816] x 100 = -95.1%
Formula
Percentage change = [(40 - 816) / 816] x 100
Subtract the new number by the original number
40 - 816 = -776
-776 ÷ 816 = -0.9509803921568627
-0.9509803921568627 x 100 = -95.1%