-30.43% is the change from 447 to 311
Calculation steps:
[( 311 - 447 ) ÷ 447] x 100 = -30.43%
Formula
Percentage change = [(311 - 447) / 447] x 100
Subtract the new number by the original number
311 - 447 = -136
-136 ÷ 447 = -0.3042505592841163
-0.3042505592841163 x 100 = -30.43%