-11.07% is the change from 307 to 273
Calculation steps:
[( 273 - 307 ) ÷ 307] x 100 = -11.07%
Formula
Percentage change = [(273 - 307) / 307] x 100
Subtract the new number by the original number
273 - 307 = -34
-34 ÷ 307 = -0.11074918566775244
-0.11074918566775244 x 100 = -11.07%