-36.64% is the change from 816 to 517
Calculation steps:
[( 517 - 816 ) ÷ 816] x 100 = -36.64%
Formula
Percentage change = [(517 - 816) / 816] x 100
Subtract the new number by the original number
517 - 816 = -299
-299 ÷ 816 = -0.36642156862745096
-0.36642156862745096 x 100 = -36.64%