-92.16% is the change from 816 to 64
Calculation steps:
[( 64 - 816 ) ÷ 816] x 100 = -92.16%
Formula
Percentage change = [(64 - 816) / 816] x 100
Subtract the new number by the original number
64 - 816 = -752
-752 ÷ 816 = -0.9215686274509803
-0.9215686274509803 x 100 = -92.16%