-66.34% is the change from 811 to 273
Calculation steps:
[( 273 - 811 ) ÷ 811] x 100 = -66.34%
Formula
Percentage change = [(273 - 811) / 811] x 100
Subtract the new number by the original number
273 - 811 = -538
-538 ÷ 811 = -0.6633785450061652
-0.6633785450061652 x 100 = -66.34%