-66.09% is the change from 805 to 273
Calculation steps:
[( 273 - 805 ) ÷ 805] x 100 = -66.09%
Formula
Percentage change = [(273 - 805) / 805] x 100
Subtract the new number by the original number
273 - 805 = -532
-532 ÷ 805 = -0.6608695652173913
-0.6608695652173913 x 100 = -66.09%