-11.53% is the change from 347 to 307
Calculation steps:
[( 307 - 347 ) ÷ 347] x 100 = -11.53%
Formula
Percentage change = [(307 - 347) / 347] x 100
Subtract the new number by the original number
307 - 347 = -40
-40 ÷ 347 = -0.11527377521613832
-0.11527377521613832 x 100 = -11.53%