-11.97% is the change from 309 to 272
Calculation steps:
[( 272 - 309 ) ÷ 309] x 100 = -11.97%
Formula
Percentage change = [(272 - 309) / 309] x 100
Subtract the new number by the original number
272 - 309 = -37
-37 ÷ 309 = -0.11974110032362459
-0.11974110032362459 x 100 = -11.97%