-2.56% is the change from 273 to 266
Calculation steps:
[( 266 - 273 ) ÷ 273] x 100 = -2.56%
Formula
Percentage change = [(266 - 273) / 273] x 100
Subtract the new number by the original number
266 - 273 = -7
-7 ÷ 273 = -0.02564102564102564
-0.02564102564102564 x 100 = -2.56%