-30.91% is the change from 647 to 447
Calculation steps:
[( 447 - 647 ) ÷ 647] x 100 = -30.91%
Formula
Percentage change = [(447 - 647) / 647] x 100
Subtract the new number by the original number
447 - 647 = -200
-200 ÷ 647 = -0.3091190108191654
-0.3091190108191654 x 100 = -30.91%