-66.54% is the change from 816 to 273
Calculation steps:
[( 273 - 816 ) ÷ 816] x 100 = -66.54%
Formula
Percentage change = [(273 - 816) / 816] x 100
Subtract the new number by the original number
273 - 816 = -543
-543 ÷ 816 = -0.6654411764705882
-0.6654411764705882 x 100 = -66.54%