-66.63% is the change from 818 to 273
Calculation steps:
[( 273 - 818 ) ÷ 818] x 100 = -66.63%
Formula
Percentage change = [(273 - 818) / 818] x 100
Subtract the new number by the original number
273 - 818 = -545
-545 ÷ 818 = -0.6662591687041565
-0.6662591687041565 x 100 = -66.63%