-12.1% is the change from 347 to 305
Calculation steps:
[( 305 - 347 ) ÷ 347] x 100 = -12.1%
Formula
Percentage change = [(305 - 347) / 347] x 100
Subtract the new number by the original number
305 - 347 = -42
-42 ÷ 347 = -0.12103746397694524
-0.12103746397694524 x 100 = -12.1%